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González-Torres L, García-Paz V, Meijide A, Goikoetxea MJ, Salgado MA, Sanz ML, Vila L. Local allergic rhinitis in children: Clinical characteristics and role of basophil activation test as a diagnostic tool. Int J Pediatr Otorhinolaryngol 2023; 172:111645. [PMID: 37481991 DOI: 10.1016/j.ijporl.2023.111645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/12/2023] [Accepted: 07/02/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND Local allergic rhinitis (LAR) is a condition involving a localized nasal allergic response in absence of systemic atopy. Most studies on LAR have been performed in adults. We aimed to describe clinical characteristics of LAR pediatric patients, its clinical evolution over a 7-year follow-up period and to study the role of basophil activation test (BAT), for its diagnosis. METHODS Forty-four children with non-allergic rhinitis (NAR) were included (24 males, 20 females, aged under 15 years). Nasal allergen provocation test (NAPT) and BAT were performed with Dermatophagoides pteronyssinus and Phleum pratense. RESULTS Seven patients (16%) were diagnosed of LAR. Six reacted to D pteronyssinus and one to P pratense. All LAR and 86% of NAR patients presented perennial symptoms. Fifty-seven percent of NAR and LAR patients referred persistent symptoms. Around half of NAR and LAR patients reported mild-moderate clinical manifestations. Three LAR patients associated conjunctival symptoms, proportionally more than NAR patients (19%, 7 out of 37). NAR patients presented bronchial asthma (n = 10) more frequently than LAR children (n = 1). More than half of LAR and NAR patients presented family history of atopy. BAT was negative in all LAR patients. On follow-up, 3 LAR patients and 10 of the 25 NAR patients who agreed to be retested, presented systemic sensitization. Dust mites were the most frequent allergen involved. CONCLUSIONS LAR should be ruled out in children with NAR. Almost half of children with LAR develop systemic sensitization over time. BAT shows low sensitivity for the diagnosis of LAR in children.
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Affiliation(s)
- L González-Torres
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain
| | - V García-Paz
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain
| | - A Meijide
- Allergy Unit, Complexo Hospitalario Universitario de Vigo, Spain
| | - M J Goikoetxea
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - M A Salgado
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - M L Sanz
- Allergy Unit, Clinica Universitaria de Navarra, Pamplona, Spain
| | - L Vila
- Allergy Pediatric Unit, Complexo Hospitalario Universitario, A Coruña, Spain.
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Mansueto M, Chavent A, Auffret S, Joumard I, Vila L, Sousa RC, Buda-Prejbeanu LD, Prejbeanu IL, Dieny B. Spintronic memristors for neuromorphic circuits based on the angular variation of tunnel magnetoresistance. Nanoscale 2021; 13:11488-11496. [PMID: 34165111 DOI: 10.1039/d1nr00346a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this study, a new type of compact magnetic memristor is demonstrated. It is based on the variation of the conductivity of a nano-sized magnetic tunnel junction as a function of the angle between the in-plane reference layer magnetization and a free layer exhibiting an isotropic in-plane coercivity. The free layer magnetization is rotated by two spin transfer torque contributions: one originating from the in-plane magnetized reference layer and the other one from an additional perpendicular polarizer integrated in the stack. Thanks to a proper tuning of the relative influence of these two torques, the magnetization of the free layer can be rotated step by step clockwise or anticlockwise in a range of angle between 0° (parallel configuration) and 180° (anti-parallel configuration) by sending pulses of current through the stack, of one or opposite polarity. The amplitude of the rotation steps and therefore of the conductance variations depends on the pulse amplitude and duration. In this way, we achieve monotonous variations of the resistance with the voltage polarity through the application of pulses in the ns range. We also retrieve the analytical expression of critical current density which is found to be in good agreement with the experimental results. The thermal stability of the intermediate resistance levels and the role of Joule heating are also discussed.
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Affiliation(s)
- M Mansueto
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - A Chavent
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - S Auffret
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - I Joumard
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - L Vila
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - R C Sousa
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - L D Buda-Prejbeanu
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - I L Prejbeanu
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
| | - B Dieny
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-SPINTEC, 38000 Grenoble, France.
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Ibáñez-Sandin MD, Rodríguez Del Río P, Alvarado MI, García BE, Garriga-Baraut T, Reche Frutos M, Escudero C, Ramirez A, Vila L, Lasa EM, Blasco C, Marchán-Martin E, Martorell A, Sanchez-García S, Rodríguez-Álvarez M, Infante S, Rodríguez Vazquez V, Olaguibel JM, Labrador-Horrillo M, Carrillo T. Onset of nut allergy in a pediatric cohort: clinical and molecular patterns. AFRUSEN study. J Investig Allergol Clin Immunol 2021; 32:270-281. [PMID: 33884956 DOI: 10.18176/jiaci.0696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nut Allergy, Peanut, Walnut, Allergy Onset, Sensitization Profile, Component Resolved Diagnosis, Anaphylaxis, Food Allergy.
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Affiliation(s)
- M D Ibáñez-Sandin
- Allergy Department, Hospital Infantil Universitario Niño Jesus, Madrid, Spain.,Health Research Institute Princesa, Madrid; cARADyAL RD16/0006/0026, Spain
| | - P Rodríguez Del Río
- Allergy Department, Hospital Infantil Universitario Niño Jesus, Madrid, Spain.,Health Research Institute Princesa, Madrid; cARADyAL RD16/0006/0026, Spain
| | - M I Alvarado
- Servicio de Alergología, Complejo Hospitalario Universitario de Cáceres, Cáceres, Spain
| | - B E García
- Service of Alergology, Complejo Hospitalario de Navarra, Pamplona, Spain
| | - T Garriga-Baraut
- Unitat d´Al·lergologia Pediàtrica, Hospital Universitari Vall d´Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.,Grup d'Investigació "Creixement i Desenvolupament", Institut de Recerca de l'Hospital Universitari Vall d'Hebron (VHIR), Barcelona, Spain
| | - M Reche Frutos
- Servicio de Alergología, Hospital Universitario Infanta Sofía, San Sebastián de los Reyes, Madrid, Spain
| | - C Escudero
- Allergy Department, Hospital Infantil Universitario Niño Jesus, Madrid, Spain.,Health Research Institute Princesa, Madrid; cARADyAL RD16/0006/0026, Spain
| | - A Ramirez
- Unidad de Alergia alimentaria, Unidad de Alergología, Hospital Universitario Virgen Macarena, Sevilla, Spain
| | - L Vila
- Complexo Hospitalario Universitario A Coruña, Spain
| | - E M Lasa
- Unidad de Alergología Infantil, Servicio de Alergología, Hospital Universitario Donostia, Spain
| | - C Blasco
- Unidad de Alergología Pediátrica, Hospital Universitario Vall d´Hebron de Barcelona, Spain
| | - E Marchán-Martin
- Complejo Hospitalario Universitario de Toledo, Servicio de Alergología, Toledo, Spain
| | - A Martorell
- Allergy Service, University General Hospital, Valencia, Spain
| | - S Sanchez-García
- Allergy Department, Hospital Infantil Universitario Niño Jesus, Madrid, Spain.,Health Research Institute Princesa, Madrid; cARADyAL RD16/0006/0026, Spain
| | - M Rodríguez-Álvarez
- Allergy Department, Hospital La Paz Institute for Health Research (IdiPAZ), Madrid, Spain
| | - S Infante
- Paediatric Allergy Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | | | - J M Olaguibel
- Servicio de Alergología, Complejo Hospitalario de Navarra, Pamplona, Spain
| | - M Labrador-Horrillo
- Sección de Alergia, Vall d'Hebron Hospital Universitari, Barcelona, Spain, Vall d'Hebron Institut de Recerca (VHIR), Barcelona Spain, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain, ARADyAL research network, Instituto de Salud Carlos III (ISCII
| | - T Carrillo
- Servicio de Alergología, Hospital Universitario de Gran Canaria Dr. Negrin, Spain
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Cosset-Chéneau M, Vila L, Zahnd G, Gusakova D, Pham VT, Grèzes C, Waintal X, Marty A, Jaffrès H, Attané JP. Measurement of the Spin Absorption Anisotropy in Lateral Spin Valves. Phys Rev Lett 2021; 126:027201. [PMID: 33512209 DOI: 10.1103/physrevlett.126.027201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
The spin absorption process in a ferromagnetic material depends on the spin orientation relative to the magnetization. Using a ferromagnet to absorb the pure spin current created within a lateral spin valve, we evidence and quantify a sizable orientation dependence of the spin absorption in Co, CoFe, and NiFe. These experiments allow us to determine the spin-mixing conductance, an elusive but fundamental parameter of the spin-dependent transport. We show that the obtained values cannot be understood within a model considering only the Larmor, transverse decoherence, and spin diffusion lengths, and rather suggest that the spin-mixing conductance is actually limited by the Sharvin conductance.
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Affiliation(s)
- M Cosset-Chéneau
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - L Vila
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - G Zahnd
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - D Gusakova
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - V T Pham
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - C Grèzes
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - X Waintal
- Université Grenoble Alpes, CEA, Pheliqs, F-38054 Grenoble, France
| | - A Marty
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
| | - H Jaffrès
- Unité Mixte de Physique CNRS/Thales, University Paris-Sud and Université Paris-Saclay, 91767 Palaiseau, France
| | - J-P Attané
- Université Grenoble Alpes, CEA, CNRS, INP-G, Spintec, F-38054 Grenoble, France
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Boureau V, Nguyen VD, Masseboeuf A, Palomino A, Gautier E, Chatterjee J, Lequeux S, Auffret S, Vila L, Sousa R, Prejbeanu L, Cooper D, Dieny B. An electron holography study of perpendicular magnetic tunnel junctions nanostructured by deposition on pre-patterned conducting pillars. Nanoscale 2020; 12:17312-17318. [PMID: 32789322 DOI: 10.1039/d0nr03353g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The fabrication of multi-gigabit magnetic random access memory (MRAM) chips requires the patterning of magnetic tunnel junctions at very small dimensions (sub-30 nm) and a very dense pitch. This remains a challenge due to the difficulty in etching magnetic tunnel junction stacks. We previously proposed a strategy to circumvent this problem by depositing the magnetic tunnel junction material on prepatterned metallic pillars, resulting in the junction being naturally shaped during deposition. Upon electrical contact, the deposit on top of the pillars constitutes the magnetic storage element of the memory cell. However, in this process, the magnetic material is also deposited in the trenches between the pillars that might affect the memory cell behaviour. Here we study the magnetic interactions between the deposit on top of the pillars and in the trenches by electron holography, at room temperature and up to 325 °C. Supported by models, we show that the additional material in the trenches is not perturbing the working principle of the memory chip and can even play the role of a flux absorber which reduces the crosstalk between neighboring dots. Besides, in the studied sample, the magnetization of the 1.4 nm thick storage layer of the dots is found to switch from out-of-plane to an in-plane configuration above 125 °C, but gradually decreases with temperature. Electron holography is shown to constitute a very efficient tool for characterizing the micromagnetic configuration of the storage layer in MRAM cells.
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Affiliation(s)
- V Boureau
- Univ. Grenoble Alpes, CEA-LETI, F-38000 Grenoble, France.
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Olivier A, Avilés-Félix L, Chavent A, Álvaro-Goémez L, Rubio-Roy M, Auffret S, Vila L, Dieny B, Sousa RC, Prejbeanu IL. Indium Tin Oxide optical access for magnetic tunnel junctions in hybrid spintronic-photonic circuits. Nanotechnology 2020; 31:425302. [PMID: 32531768 DOI: 10.1088/1361-6528/ab9c56] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The all-optical magnetization reversal of magnetic layers, by picosecond optical pulses, is of particular interest as it shows the potential for energy-efficient and fast magnetic tunnel junction (MTJ) elements. This approach requires memory elements that are optically and electronically accessible, for optical writing and electronic read-out. In this paper, we propose the integration of indium tin oxide (ITO) as a transparent conducting electrode for magnetic tunnel junctions in integrated spintronic-photonic circuits. To provide light with sufficient energy to the MTJ free layer and allow electrical read-out of the MTJ state, we successfully integrated indium tin oxide as a top transparent electrode. The study shows that ITO film deposition by physical vapor deposition with conditions such as high source power and low O2 flow achieves smooth and conductive thin films. Increase in grain size was associated with low resistivity. Deposition of 150 nm ITO at 300 W, O2 flow of 1 sccm and 8.10-3 mbar vacuum pressure results in 4.8 × 10-4 Ω.cm resistivity and up to 80% transmittance at 800 nm wavelength. The patterning of ITO using CH4/H2 chemistry in a reactive ion etch process was investigated showing almost vertical sidewalls for diameters down to 50 nm. The ITO based process flow was compared to a standard magnetic tunnel junctions fabrication process flow based on Ta hard mask. Electrical measurements validate that the proposed process based on ITO results in properties equivalent to the standard process. We also show electrical results of magnetic tunnel junctions having all-optical switching top electrode fabricated with ITO for optical access. The developed ITO process flow shows very promising initial results and provides a way to fabricate these new devices to integrate all-optical switching magnetic tunnel junctions with electronic and photonic elements.
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Affiliation(s)
- A Olivier
- Univ. Grenoble Alpes, CEA, CNRS, Spintec, 38000 Grenoble, France
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Ugarte-Gil MF, Dubey J, Mcgwin G, Vila L, Alarcon GS. THU0286 THE SYSTEMIC LUPUS INTERNATIONAL COLLABORATING CLINICS (SLICC) FRAILTY INDEX (SLICC-FI) PREDICTS DAMAGE ACCRUAL IN SYSTEMIC LUPUS ERYTHEMATOSUS (SLE) PATIENTS. DATA FROM A MULTI-ETHNIC, MULTI-CENTER US LUPUS COHORT. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:The Systemic Lupus International Collaborating Clinics (SLICC) Frailty Index (SLICC-FI) has been developed as a predictor of outcomes in SLE patients1-3. It combines disease activity, damage, comorbidities and health-related quality of life measures.Objectives:To evaluate the SLICC-FI as a predictor of damage accrual in systemic lupus erythematosus (SLE) patients.Methods:Patients from a multi-ethnic, multi-center US lupus cohort were included. Damage was ascertained with the SLICC/American College of Rheumatology (ACR) damage index (SDI) at last visit. The first visit in which the SLICC-FI could be derived was considered as the baseline visit. Univariable and multivariable Poisson regression models were performed to determine the association between the baseline SLICC-FI and last SDI, adjusted for sex, age at diagnosis, ethnicity, insurance, prednisone daily dose, antimalarial and immunosuppressive drug use at baseline. Age and gender were included a priori in the multivariable model, the other variables were included if they had a p<0.10 in the univariable models.Results:Of the 503 patients included, 454 (90.3%) were female with mean (SD) age 37.1 (12.5) years at diagnosis; 174 (34.6%) were African-American, 144 (28.6%) were Caucasians, 86 (17.1%) Hispanics (Texas), and 99 (19.7%) were Hispanics (Puerto Rico). The mean (SD) baseline SLICC-FI was 0.26 (0.06). The final mean (SD) SDI score was 1.9 (2.2). Higher SLICC-FI scores at baseline predicted greater damage accrual in the univariable analysis [Estimate=5.058, (SE=0.498); p<0.0001]. The SLICC-FI remained associated with damage accrual in the multivariable model, after adjustment for possible confounders [Estimate= 3.561 (SE=0.538); p<0.0001].Conclusion:The SLICC-FI predicts damage accrual in SLE patients from a multi-ethnic cohort, supporting the importance of this index in the evaluation of SLE patients, combining several aspects of the disease.References:[1]Legge A, Kirkland S, Rockwood K, et al. Construction of a Frailty Index as a Novel Health Measure in Systemic Lupus Erythematosus. J Rheumatol. 2020; 47: 72-81[2]Legge A, Kirkland S, Rockwood K, et al. Evaluating the Properties of a Frailty Index and Its Association With Mortality Risk Among Patients With Systemic Lupus Erythematosus. Arthritis Rheumatol. 2019; 71: 1297-107[3]Legge A, Kirkland S, Rockwood K, et al. Prediction of Damage Accrual in Systemic Lupus Erythematosus Using the Systemic Lupus International Collaborating Clinics Frailty Index (SLICC-FI). Arthitis Rheumatol. Epub ahead of print 2019 Oct 21.Disclosure of Interests:Manuel F. Ugarte-Gil Grant/research support from: Jannsen, Pfizer, Jyoti Dubey: None declared, Gerald McGwin: None declared, Luis Vila: None declared, Graciela S Alarcon: None declared
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Lequeux S, Perrissin N, Grégoire G, Tillie L, Chavent A, Strelkov N, Vila L, Buda-Prejbeanu LD, Auffret S, Sousa RC, Prejbeanu IL, Di Russo E, Gautier E, Conlan AP, Cooper D, Dieny B. Thermal robustness of magnetic tunnel junctions with perpendicular shape anisotropy. Nanoscale 2020; 12:6378-6384. [PMID: 32134422 DOI: 10.1039/c9nr10366j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The concept of Perpendicular Shape Anisotropy STT-MRAM (PSA-STT-MRAM) has been recently proposed as a solution to enable the downsize scalability of STT-MRAM devices beyond the sub-20 nm technology node. For conventional p-STT-MRAM devices with sub-20 nm diameters, the perpendicular anisotropy arising from the MgO/CoFeB interface becomes too weak to ensure thermal stability of the storage layer. In addition, this interfacial anisotropy rapidly decreases with increasing temperature which constitutes a drawback in applications with a large range of operating temperatures. Here, we show that by using a PSA based storage layer, the source of anisotropy is much more robust against thermal fluctuations than the interfacial anisotropy, which allows considerable reduction of the temperature dependence of the coercivity. From a practical point of view, this is very interesting for applications having to operate on a wide range of temperatures (e.g. automotive -40 °C/+150 °C).
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Affiliation(s)
- S Lequeux
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC-SPINTEC, 38000 Grenoble, France.
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Peñalva Arigita A, Sansano A, Lecha M, Prats R, Vila L. SUN-PO124: Study of Adherence to Treatment with Commercial Thickener in a Population with Liquids Dysphagia. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32758-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ariza MJ, Rioja J, Ibarretxe D, Camacho A, Díaz-Díaz JL, Mangas A, Carbayo-Herencia JA, Ruiz-Ocaña P, Lamíquiz-Moneo I, Mosquera D, Sáenz P, Masana L, Muñiz-Grijalvo O, Pérez-Calahorra S, Valdivielso P, Suárez Tembra M, Iglesias GP, Carbayo Herencia J, Guerrero Buitrago C, Vila L, Morales Coca C, Llargués Rocabruna E, Perea Castillo V, Pedro-Botet J, Climent E, Mauri Pont M, Pinto X, Ortega Martínez de la Victoria E, Amor J, Zambón Rados D, Blanco Vaca F, Ramiro Lozano J, Fuentes Jiménez F, Soler I, Ferrer C, Zamora Cervantes A, Vila Belmonte A, Novoa Mogollón F, Sanchez-Hernández R, Expósito Montesdeoca A, Romero Jiménez M, González García M, Bueno Díez M, Brea Hernando A, Lahoz C, Mostaza Prieto J, Millán Núñez-Cortés J, Reinares García L, Blanco Echevarría A, Ariza Corbo MJ, Rioja Villodres J, Sánchez-Chaparro M, Jansen Chaparro S, Sáenz Aranzubía P, Martorell Mateu E, Almagro Múgica F, Muñiz Grijalvo O, Masana Martín L, Plana Gil N, Ibarretxe Gerediaga D, Rodríguez Borjabad C, Zabala López S, Hernández Mijares A, Ascaso Gimilio J, Pérez García L, Civeira Murillo F, Pérez-Calahorra S, Lamiquiz-Moneo I, Mateo Gallego R, Marco Benedí V, Ferrando Vela J. Molecular basis of the familial chylomicronemia syndrome in patients from the National Dyslipidemia Registry of the Spanish Atherosclerosis Society. J Clin Lipidol 2018; 12:1482-1492.e3. [DOI: 10.1016/j.jacl.2018.07.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/09/2018] [Accepted: 07/24/2018] [Indexed: 01/16/2023]
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Navas Madroñal M, Vila L, Fité J, Martinez-Gonzalez J, Rodriguez C, Camacho M, Galán M. Targeting endoplasmic reticulum stress as a therapy to manage abdominal aortic aneurysm disease. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Perrissin N, Lequeux S, Strelkov N, Chavent A, Vila L, Buda-Prejbeanu LD, Auffret S, Sousa RC, Prejbeanu IL, Dieny B. A highly thermally stable sub-20 nm magnetic random-access memory based on perpendicular shape anisotropy. Nanoscale 2018; 10:12187-12195. [PMID: 29923577 DOI: 10.1039/c8nr01365a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A new approach to increase the downsize scalability of perpendicular STT-MRAM is presented. It consists of significantly increasing the thickness of the storage layer in out-of-plane magnetized tunnel junctions (pMTJ) as compared to conventional pMTJ in order to induce a perpendicular shape anisotropy (PSA) in this layer. This PSA is obtained by depositing a thick ferromagnetic (FM) layer on top of an MgO/FeCoB based magnetic tunnel junction (MTJ) so that the thickness of the storage layer is of the order of or larger than the diameter of the MTJ pillar. In contrast to conventional spin transfer torque magnetic random access memory (STT-MRAM) wherein the demagnetizing energy opposes the interfacial perpendicular magnetic anisotropy (iPMA), in these novel memory cells, both PSA and iPMA contributions favor the out-of-plane orientation of the storage layer magnetization. Using thicker storage layers in these PSA-STT-MRAMs has several advantages. Due to the PSA, very high and easily tunable thermal stability factors can be achieved, even down to sub-10 nm diameters. Moreover, a low damping material can be used for the thick FM material thus leading to a reduction of the write current. The paper describes this new PSA-STT-MRAM concept, practical realization of such memory arrays, magnetic characterization demonstrating thermal stability factor above 200 for MTJs as small as 8 nm in diameter and possibility to maintain the thermal stability factor above 60 down to 4 nm diameter.
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Affiliation(s)
- N Perrissin
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP*, INAC-SPINTEC, 38000 Grenoble, France.
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Noel P, Thomas C, Fu Y, Vila L, Haas B, Jouneau PH, Gambarelli S, Meunier T, Ballet P, Attané JP. Highly Efficient Spin-to-Charge Current Conversion in Strained HgTe Surface States Protected by a HgCdTe Layer. Phys Rev Lett 2018; 120:167201. [PMID: 29756906 DOI: 10.1103/physrevlett.120.167201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 03/08/2018] [Indexed: 06/08/2023]
Abstract
We report the observation of spin-to-charge current conversion in strained mercury telluride at room temperature, using spin pumping experiments. We show that a HgCdTe barrier can be used to protect the HgTe from direct contact with the ferromagnet, leading to very high conversion rates, with inverse Edelstein lengths up to 2.0±0.5 nm. The influence of the HgTe layer thickness on the conversion efficiency is found to differ strongly from what is expected in spin Hall effect systems. These measurements, associated with the temperature dependence of the resistivity, suggest that these high conversion rates are due to the spin momentum locking property of HgTe surface states.
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Affiliation(s)
- P Noel
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France
| | - C Thomas
- Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F38054 Grenoble, France
| | - Y Fu
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France
| | - L Vila
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France
| | - B Haas
- CEA, INAC-MEM, 38054 Grenoble, France
| | | | - S Gambarelli
- CEA, Institut Nanosciences et Cryogénie, SyMMES F-38000 Grenoble, France
| | - T Meunier
- CNRS, Institut NEEL, 38042 Grenoble, France
| | - P Ballet
- Univ. Grenoble Alpes, CEA, LETI, MINATEC Campus, F38054 Grenoble, France
| | - J P Attané
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC, SPINTEC, F-38000 Grenoble, France
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Carcereny E, Boada A, Blanco R, Marsé R, Rivera N, Majem M, Terrasa J, García Y, Coves J, Estival A, Dalmau E, Vila L, Riera P, Morán T. P2.07-041 Immuno-Related Cutaneous Adverse Events (IRcutAEs) in Patients (P) with Advanced NSCLC: A Single-Institution Prospective Study. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.11.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Morán T, Vila L, Teruel I, Erasun C, Angelats L, España S, Marc C, Garcia-Balaña N, Velarde J, Carcereny E. P1.01-062 KRAS Mutations (KRAS-Mut) and antiPD1/PDL1 Therapy in a Cohort of Lung Cancer (LC) Patients (P). Experience from a Single Institution. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Erasun Lecuona C, Moran Bueno M, Vila L, Teruel I, Angelats L, Ferrando A, Plaja A, Torres P, Lopez E, Muriel R, Muñoz-Marmol A, Mate J, Velarde J, Carcereny Costa E. KRAS mutations (KRAS-mut) and antiPD1/PDL1 therapy in a cohort of non-small cell lung cancer (NSCLC) patients (p): Experience from a single institution. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx376.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Erasun Lecuona C, Moran Bueno M, Vila L, Teruel I, Angelats L, Ferrando A, Plaja A, Torres P, Lopez E, Muriel R, Muñoz-Marmol A, Mate J, Velarde J, Carcereny Costa E. KRAS mutations (KRAS-mut) and antiPD1/PDL1 therapy in a cohort of non-small cell lung cancer (NSCLC) patients (p): Experience from a single institution. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx376.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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18
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Affiliation(s)
- A Muinelo
- Pediatric Allergy Unit, Hospital Materno-Infantil Teresa Herrera, La Coruña, Spain
| | - O Pérez
- Pediatric Allergy Unit, Hospital Materno-Infantil Teresa Herrera, La Coruña, Spain
| | - L Vila
- Pediatric Allergy Unit, Hospital Materno-Infantil Teresa Herrera, La Coruña, Spain
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Armario P, Jericó C, Vila L, Freixa R, Martin-Castillejos C, Rotllan M. Área de Atención Integrada de Riesgo Vascular: un nuevo modelo organizativo para el control global de los factores de riesgo. Hipertensión y Riesgo Vascular 2017; 34:72-77. [DOI: 10.1016/j.hipert.2016.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/18/2016] [Indexed: 10/20/2022]
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20
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Pfeiffer A, Reeve RM, Voto M, Savero-Torres W, Richter N, Vila L, Attané JP, Lopez-Diaz L, Kläui M. Geometrical control of pure spin current induced domain wall depinning. J Phys Condens Matter 2017; 29:085802. [PMID: 28001132 DOI: 10.1088/1361-648x/aa5516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigate the pure spin-current assisted depinning of magnetic domain walls in half ring based Py/Al lateral spin valve structures. Our optimized geometry incorporating a patterned notch in the detector electrode, directly below the Al spin conduit, provides a tailored pinning potential for a transverse domain wall and allows for a precise control over the magnetization configuration and as a result the domain wall pinning. Due to the patterned notch, we are able to study the depinning field as a function of the applied external field for certain applied current densities and observe a clear asymmetry for the two opposite field directions. Micromagnetic simulations show that this can be explained by the asymmetry of the pinning potential. By direct comparison of the calculated efficiencies for different external field and spin current directions, we are able to disentangle the different contributions from the spin transfer torque, Joule heating and the Oersted field. The observed high efficiency of the pure spin current induced spin transfer torque allows for a complete depinning of the domain wall at zero external field for a charge current density of [Formula: see text] A m-2, which is attributed to the optimal control of the position of the domain wall.
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Affiliation(s)
- A Pfeiffer
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany. Graduate School of Excellence Materials Science in Mainz (MAINZ), Staudinger Weg 9, 55128 Mainz, Germany
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Oyarzún S, Nandy AK, Rortais F, Rojas-Sánchez JC, Dau MT, Noël P, Laczkowski P, Pouget S, Okuno H, Vila L, Vergnaud C, Beigné C, Marty A, Attané JP, Gambarelli S, George JM, Jaffrès H, Blügel S, Jamet M. Evidence for spin-to-charge conversion by Rashba coupling in metallic states at the Fe/Ge(111) interface. Nat Commun 2016; 7:13857. [PMID: 27976747 PMCID: PMC5171917 DOI: 10.1038/ncomms13857] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 11/04/2016] [Indexed: 12/13/2022] Open
Abstract
The spin-orbit coupling relating the electron spin and momentum allows for spin generation, detection and manipulation. It thus fulfils the three basic functions of the spin field-effect transistor. However, the spin Hall effect in bulk germanium is too weak to produce spin currents, whereas large Rashba effect at Ge(111) surfaces covered with heavy metals could generate spin-polarized currents. The Rashba spin splitting can actually be as large as hundreds of meV. Here we show a giant spin-to-charge conversion in metallic states at the Fe/Ge(111) interface due to the Rashba coupling. We generate very large charge currents by direct spin pumping into the interface states from 20 K to room temperature. The presence of these metallic states at the Fe/Ge(111) interface is demonstrated by first-principles electronic structure calculations. By this, we demonstrate how to take advantage of the spin-orbit coupling for the development of the spin field-effect transistor.
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Affiliation(s)
- S Oyarzún
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
- Departamento de Fisica, CEDENNA, Universidad de Santiago de Chile (USACH), 9170124 Santiago, Chile
| | - A K Nandy
- Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
| | - F Rortais
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - J-C Rojas-Sánchez
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - M-T Dau
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - P Noël
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - P Laczkowski
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - S Pouget
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - H Okuno
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - L Vila
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - C Vergnaud
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - C Beigné
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - A Marty
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - J-P Attané
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - S Gambarelli
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
| | - J-M George
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - H Jaffrès
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767, Palaiseau, France
| | - S Blügel
- Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
| | - M Jamet
- Institut des Nanosciences et l'Energie Atomique et Cryogénie, INAC, Commissariat á aux Energies Alternatives-Univ. Grenoble Alpes, 17 rue des Martyrs, F-38000 Grenoble, France
- CEA, INAC, F-38000 Grenoble, France
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22
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Lesne E, Fu Y, Oyarzun S, Rojas-Sánchez JC, Vaz DC, Naganuma H, Sicoli G, Attané JP, Jamet M, Jacquet E, George JM, Barthélémy A, Jaffrès H, Fert A, Bibes M, Vila L. Highly efficient and tunable spin-to-charge conversion through Rashba coupling at oxide interfaces. Nat Mater 2016; 15:1261-1266. [PMID: 27571452 DOI: 10.1038/nmat4726] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 07/08/2016] [Indexed: 05/23/2023]
Abstract
The spin-orbit interaction couples the electrons' motion to their spin. As a result, a charge current running through a material with strong spin-orbit coupling generates a transverse spin current (spin Hall effect, SHE) and vice versa (inverse spin Hall effect, ISHE). The emergence of SHE and ISHE as charge-to-spin interconversion mechanisms offers a variety of novel spintronic functionalities and devices, some of which do not require any ferromagnetic material. However, the interconversion efficiency of SHE and ISHE (spin Hall angle) is a bulk property that rarely exceeds ten percent, and does not take advantage of interfacial and low-dimensional effects otherwise ubiquitous in spintronic hetero- and mesostructures. Here, we make use of an interface-driven spin-orbit coupling mechanism-the Rashba effect-in the oxide two-dimensional electron system (2DES) LaAlO3/SrTiO3 to achieve spin-to-charge conversion with unprecedented efficiency. Through spin pumping, we inject a spin current from a NiFe film into the oxide 2DES and detect the resulting charge current, which can be strongly modulated by a gate voltage. We discuss the amplitude of the effect and its gate dependence on the basis of the electronic structure of the 2DES and highlight the importance of a long scattering time to achieve efficient spin-to-charge interconversion.
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Affiliation(s)
- E Lesne
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - Yu Fu
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - S Oyarzun
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
- Departamento de Física, CEDENNA, Universidad de Santiago de Chile (USACH), Avenida Ecuador 3493, 9170124 Santiago, Chile
| | - J C Rojas-Sánchez
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - D C Vaz
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - H Naganuma
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
- Tohoku University, Department of Applied Physics, 6-6-05 Aoba, Aramaki, Aoba, Sendai 980-8579, Japan
| | - G Sicoli
- Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, F-38000 Grenoble, France
| | - J-P Attané
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - M Jamet
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
| | - E Jacquet
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - J-M George
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Barthélémy
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - H Jaffrès
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Fert
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - M Bibes
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - L Vila
- Spintec, Institut Nanosciences et Cryogenie, Univ. Grenoble Alpes, CEA, CNRS, F-38000 Grenoble, France
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Martín-Campos J, Julve J, Plana N, Figueras R, Esteve E, Mauri M, Bueno M, Caixàs A, Llargués E, Vila À, Morales C, Soler C, Argimón J, Mayos J, Grau J, Zamora A, Matas L, Vila L, Masana L, Blanco-Vaca F. Low-density lipoprotein gene score to identify polygenic forms of familial hypercholesterolemia in a Spanish population. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sansano Alguero A, Alves C, Lecha M, Cots I, Vila L, Martin M, Castillo E, Vert S, Viguera L. MON-LB276: Effects of a Nutritional Program for Overweight and Obese Adults With Intellectual and Development Disabilities in Community Residences. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30910-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rortais F, Oyarzún S, Bottegoni F, Rojas-Sánchez JC, Laczkowski P, Ferrari A, Vergnaud C, Ducruet C, Beigné C, Reyren N, Marty A, Attané JP, Vila L, Gambarelli S, Widiez J, Ciccacci F, Jaffrès H, George JM, Jamet M. Spin transport in p-type germanium. J Phys Condens Matter 2016; 28:165801. [PMID: 26988255 DOI: 10.1088/0953-8984/28/16/165801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on the spin transport properties in p-doped germanium (Ge-p) using low temperature magnetoresistance measurements, electrical spin injection from a ferromagnetic metal and the spin pumping-inverse spin Hall effect method. Electrical spin injection is carried out using three-terminal measurements and the Hanle effect. In the 2-20 K temperature range, weak antilocalization and the Hanle effect provide the same spin lifetime in the germanium valence band (≈1 ps) in agreement with predicted values and previous optical measurements. These results, combined with dynamical spin injection by spin pumping and the inverse spin Hall effect, demonstrate successful spin accumulation in Ge. We also estimate the spin Hall angle θ(SHE) in Ge-p (6-7 x 10(-4) at room temperature, pointing out the essential role of ionized impurities in spin dependent scattering.
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Affiliation(s)
- F Rortais
- Université Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France. CEA, INAC-SPINTEC, F-38000 Grenoble, France. CNRS, INAC-SPINTEC, F-38000 Grenoble, France
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Medina JDLT, Hamoir G, Velázquez-Galván Y, Pouget S, Okuno H, Vila L, Encinas A, Piraux L. Large magnetic anisotropy enhancement in size controlled Ni nanowires electrodeposited into nanoporous alumina templates. Nanotechnology 2016; 27:145702. [PMID: 26906237 DOI: 10.1088/0957-4484/27/14/145702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A large enhancement of the magnetic anisotropy of Ni nanowires (NWs) embedded in anodic aluminium oxide porous membranes is obtained as a result of an induced magnetoelastic (ME) anisotropy contribution. This unusual large anisotropy enhancement depends on the diameter of the NWs and exceeds the magnetostatic (MS) contribution. As a consequence, it leads to effective magnetic anisotropy energies as large as 1.4 × 10(6) erg cm(-3), which are of the same order of magnitude and comparable to the MS energies of harder magnetic materials like Co NWs. Specifically, from ferromagnetic resonance experiments, the magnetic anisotropy of the NWs has been observed to increase as its diameter is decreased, leading to values that are about four times larger than the corresponding value when only the MS anisotropy is present. Our results are consistent with the recently proposed growth mechanism of Ni NWs that proceeds via a poly-crystalline stage at the bottom followed by a single-crystalline stage with texture [110] parallel to the axis of the NWs. A strong correlation between reducing the diameter of the NWs with the decrease of the length of the poly-crystalline segment and the enhancement of the effective magnetic anisotropy has been shown. Magnetization curves obtained from alternating gradient magnetometry experiments show that the average ME anisotropy results from the competition between the magnetic anisotropies of both crystalline segments of the NWs. Understanding the influence of size and confinement effects on the magnetic properties of nanocomposites is of prime interest for the development of novel and agile devices.
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Affiliation(s)
- J De La Torre Medina
- Instituto de Investigaciones en Materiales-Unidad Morelia, Universidad Nacional Autónoma de México. Antigua Carretera a Pátzcuaro No. 8701 Col. Ex Hacienda de San José de la Huerta, C. P. 58190, Morelia, Mexico
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Avendaño MS, Martínez-Revelles S, Aguado A, Simões MR, González-Amor M, Palacios R, Guillem-Llobat P, Vassallo DV, Vila L, García-Puig J, Beltrán LM, Alonso MJ, Cachofeiro MV, Salaices M, Briones AM. Role of COX-2-derived PGE2 on vascular stiffness and function in hypertension. Br J Pharmacol 2016; 173:1541-55. [PMID: 26856544 DOI: 10.1111/bph.13457] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 01/08/2016] [Accepted: 01/29/2016] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Prostanoids derived from COX-2 and EP receptors are involved in vascular remodelling in different cardiovascular pathologies. This study evaluates the contribution of COX-2 and EP1 receptors to vascular remodelling and function in hypertension. EXPERIMENTAL APPROACH Spontaneously hypertensive rats (SHR) and angiotensin II (AngII)-infused (1.44 mg · kg(-1) · day(-1), 2 weeks) mice were treated with the COX-2 inhibitor celecoxib (25 mg · kg(-1) · day(-1) i.p) or with the EP1 receptor antagonist SC19220 (10 mg · kg(-1) · day(-1) i.p.). COX-2(-/-) mice with or without AngII infusion were also used. KEY RESULTS Celecoxib and SC19220 treatment did not modify the altered lumen diameter and wall : lumen ratio in mesenteric resistance arteries from SHR-infused and/or AngII-infused animals. However, both treatments and COX-2 deficiency decreased the augmented vascular stiffness in vessels from hypertensive animals. This was accompanied by diminished vascular collagen deposition, normalization of altered elastin structure and decreased connective tissue growth factor and plasminogen activator inhibitor-1 gene expression. COX-2 deficiency and SC19220 treatment diminished the increased vasoconstrictor responses and endothelial dysfunction induced by AngII infusion. Hypertensive animals showed increased mPGES-1 expression and PGE2 production in vascular tissue, normalized by celecoxib. Celecoxib treatment also decreased AngII-induced macrophage infiltration and TNF-α expression. Macrophage conditioned media (MCM) increased COX-2 and collagen type I expression in vascular smooth muscle cells; the latter was reduced by celecoxib treatment. CONCLUSIONS AND IMPLICATIONS COX-2 and EP1 receptors participate in the increased extracellular matrix deposition and vascular stiffness, the impaired vascular function and inflammation in hypertension. Targeting PGE2 receptors might have benefits in hypertension-associated vascular damage.
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Affiliation(s)
- M S Avendaño
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - S Martínez-Revelles
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - A Aguado
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - M R Simões
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain.,Dept. Physiological Sciences, Federal University of Espirito Santo, Vitoria, Brazil
| | - M González-Amor
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - R Palacios
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - P Guillem-Llobat
- Centro de Biología Molecular "Severo Ochoa", UAM-CSIC, Madrid, Spain
| | - D V Vassallo
- Dept. Physiological Sciences, Federal University of Espirito Santo, Vitoria, Brazil
| | - L Vila
- Laboratorio de Angiología, Biología Vascular e Inflamación, Instituto de Investigación Biomédica (IIB Sant Pau), Barcelona, Spain
| | - J García-Puig
- Servicio de Medicina Interna, Hospital Universitario La Paz, UAM, IdiPaz, Madrid, Spain
| | - L M Beltrán
- Servicio de Medicina Interna, Hospital Universitario La Paz, UAM, IdiPaz, Madrid, Spain
| | - M J Alonso
- Dept Ciencias Básicas de la Salud, Universidad Rey Juan Carlos, Alcorcón, Spain
| | - M V Cachofeiro
- Dept. Fisiología, Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - M Salaices
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
| | - A M Briones
- Dept. Farmacología, Universidad Autónoma de Madrid (UAM), Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, Spain
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29
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Rojas-Sánchez JC, Oyarzún S, Fu Y, Marty A, Vergnaud C, Gambarelli S, Vila L, Jamet M, Ohtsubo Y, Taleb-Ibrahimi A, Le Fèvre P, Bertran F, Reyren N, George JM, Fert A. Spin to Charge Conversion at Room Temperature by Spin Pumping into a New Type of Topological Insulator: α-Sn Films. Phys Rev Lett 2016; 116:096602. [PMID: 26991190 DOI: 10.1103/physrevlett.116.096602] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 06/05/2023]
Abstract
We present results on spin to charge current conversion in experiments of resonant spin pumping into the Dirac cone with helical spin polarization of the elemental topological insulator (TI) α-Sn. By angle-resolved photoelectron spectroscopy (ARPES), we first check that the Dirac cone (DC) at the α-Sn (0 0 1) surface subsists after covering Sn with Ag. Then we show that resonant spin pumping at room temperature from Fe through Ag into α-Sn layers induces a lateral charge current that can be ascribed to the inverse Edelstein effect by the DC states. Our observation of an inverse Edelstein effect length much longer than those generally found for Rashba interfaces demonstrates the potential of TIs for the conversion between spin and charge in spintronic devices. By comparing our results with data on the relaxation time of TI free surface states from time-resolved ARPES, we can anticipate the ultimate potential of the TI for spin to charge conversion and the conditions to reach it.
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Affiliation(s)
- J-C Rojas-Sánchez
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - S Oyarzún
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - Y Fu
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - A Marty
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - C Vergnaud
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - S Gambarelli
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - L Vila
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - M Jamet
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France
- CEA, Institut Nanosciences et Cryogénie, F-38000 Grenoble, France
| | - Y Ohtsubo
- Graduate School of Frontier Biosciences, Osaka University, Suita 565-0871, Japan
- Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan
| | - A Taleb-Ibrahimi
- UR1 CNRS, Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
- Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
| | - P Le Fèvre
- Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
| | - F Bertran
- Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
| | - N Reyren
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - J-M George
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Fert
- Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, 91767 Palaiseau, France
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30
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Frangou L, Oyarzún S, Auffret S, Vila L, Gambarelli S, Baltz V. Enhanced Spin Pumping Efficiency in Antiferromagnetic IrMn Thin Films around the Magnetic Phase Transition. Phys Rev Lett 2016; 116:077203. [PMID: 26943556 DOI: 10.1103/physrevlett.116.077203] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Indexed: 06/05/2023]
Abstract
We report the measurement of a spin pumping effect due to fluctuations of the magnetic order of IrMn thin films. A precessing NiFe ferromagnet injected spins into IrMn spin sinks, and enhanced damping was observed around the IrMn magnetic phase transition. Our data were compared to a recently developed theory and converted into interfacial spin mixing conductance enhancements. By spotting the spin pumping peak, the thickness dependence of the IrMn critical temperature could be determined and the characteristic length for the spin-spin interactions was deduced.
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Affiliation(s)
- L Frangou
- Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France
- CNRS, SPINTEC, F-38000 Grenoble, France
- CEA, INAC-SPINTEC, F-38000 Grenoble, France
| | - S Oyarzún
- Univ. Grenoble Alpes, NM, F-38000 Grenoble, France
- CEA, INAC-NM, F-38000 Grenoble, France
| | - S Auffret
- Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France
- CNRS, SPINTEC, F-38000 Grenoble, France
- CEA, INAC-SPINTEC, F-38000 Grenoble, France
| | - L Vila
- Univ. Grenoble Alpes, NM, F-38000 Grenoble, France
- CEA, INAC-NM, F-38000 Grenoble, France
| | - S Gambarelli
- Univ. Grenoble Alpes, SCIB, F-38000 Grenoble, France
- CEA, INAC-SCIB, F-38000 Grenoble, France
| | - V Baltz
- Univ. Grenoble Alpes, SPINTEC, F-38000 Grenoble, France
- CNRS, SPINTEC, F-38000 Grenoble, France
- CEA, INAC-SPINTEC, F-38000 Grenoble, France
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31
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Zahnd G, Vila L, Pham TV, Marty A, Laczkowski P, Savero Torres W, Beigné C, Vergnaud C, Jamet M, Attané JP. Comparison of the use of NiFe and CoFe as electrodes for metallic lateral spin valves. Nanotechnology 2016; 27:035201. [PMID: 26637104 DOI: 10.1088/0957-4484/27/3/035201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Spin injection and detection in Co60Fe40-based all-metallic lateral spin valves have been studied at both room and low temperatures. The obtained spin signals amplitudes have been compared to those of identical Ni80Fe20-based devices. The replacement of Ni80Fe20 by CoFe allows increasing the spin signal amplitude by up to one order of magnitude, thus reaching 50 mΩ at room temperature. The spin signal dependence with the distance between the ferromagnetic electrodes has been analyzed using both a 1D spin-transport model and finite element method simulations. The enhancement of the spin signal amplitude when using CoFe electrodes can be explained by a higher effective polarization.
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Affiliation(s)
- G Zahnd
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France. CEA, Institut Nanosciences et Cryogénie, SP2M, F-38000 Grenoble, France
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32
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Lasmarías MC, Delgado S, Vila L, González S, Loncan P, Pueyo CB, Ledesma A, Gómez-Batiste X. P-19 The model of advanced care planning in catalonia (Spain). BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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33
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Werbin MH, Moran T, Teruel I, Vila L, Moreno MG, Perez G, Centeno C, Tudela C, Raya P, Andreo F, Mate J, Margeli V, Estival A, Carcereny E. 3103 Impact of three and further treatment lines in advanced Non-Small Cell Lung Cancer patients according to molecular profile: A retrospective analysis. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31744-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Tetienne JP, Hingant T, Martínez L, Rohart S, Thiaville A, Diez LH, Garcia K, Adam JP, Kim JV, Roch JF, Miron I, Gaudin G, Vila L, Ocker B, Ravelosona D, Jacques V. The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry. Nat Commun 2015; 6:6733. [DOI: 10.1038/ncomms7733] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 02/23/2015] [Indexed: 11/09/2022] Open
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35
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Vila L, García V. Oral tolerance induction with wheat: a valid therapeutic option in allergic patients. J Investig Allergol Clin Immunol 2015; 25:77-78. [PMID: 25898707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
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36
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Dilmé JF, Bellmunt S, Camacho M, Solà-Villà D, Romero JM, Escudero JR, Vila L. Influence of Cardiovascular Risk Factors on Levels of Matrix Metalloproteinases 2 and 9 in Human Abdominal Aortic Aneurysms. J Vasc Surg 2014. [DOI: 10.1016/j.jvs.2014.08.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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37
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Nguyen VD, Torres WS, Laczkowski P, Marty A, Jamet M, Beigné C, Notin L, Vila L, Attané JP. Elementary depinning processes of magnetic domain walls under fields and currents. Sci Rep 2014; 4:6509. [PMID: 25270773 PMCID: PMC4180821 DOI: 10.1038/srep06509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 07/24/2014] [Indexed: 11/09/2022] Open
Abstract
The probability laws associated to domain wall depinning under fields and currents have been studied in NiFe and FePt nanowires. Three basic domain wall depinning processes, associated to different potential landscapes, are found to appear identically in those systems with very different anisotropies. We show that these processes constitute the building blocks of any complex depinning mechanism. A Markovian analysis is proposed, that provides a unified picture of the depinning mechanism and an insight into the pinning potential landscape.
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Affiliation(s)
- V D Nguyen
- 1] INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France [2] Institut Néel and Université Joseph Fourier, 38042 Grenoble, France
| | - W Savero Torres
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - P Laczkowski
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - A Marty
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - M Jamet
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - C Beigné
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - L Notin
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - L Vila
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
| | - J P Attané
- INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France
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38
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Estival A, Etxaniz O, Cuadra Urteaga J, Romeo M, Blanco I, Gil M, Ahlal S, Ojanguren I, Indacochea A, Vila L, Balana C. Second Primary Malignances (Spms) in Patients (P) with Gastrointestinal Stromal Tumors (Gists) – a Coincidence or an Effect of Imatinib? Ann Oncol 2014. [DOI: 10.1093/annonc/mdu354.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Indacochea A, Estival A, Ahlal S, Etxaniz O, Gil M, Vila L, Cuadra Urtega J, Carrato C, Balana C. Rechallenge with Bevacizumab (Bev) in Patients (P) with Glioblastoma (Gbm) and Previous Objective Response to Bev. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu330.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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40
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Plana N, Figueras R, Esteve E, Mauri M, Bueno M, Caixàs A, Llargués E, Vila A, Morales C, Soler C, Argimon J, Mayos J, Grau J, Zamora A, Matas L, Vila L, Blanco-Vaca F. Use of next generation sequencing for the diagnosis of familial hypercholesterolemia. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Savero Torres W, Laczkowski P, Nguyen VD, Rojas Sanchez JC, Vila L, Marty A, Jamet M, Attané JP. Switchable spin-current source controlled by magnetic domain walls. Nano Lett 2014; 14:4016-4022. [PMID: 24874296 DOI: 10.1021/nl501453p] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using nonlocal spin injection, spin-orbit coupling, or spincaloritronic effects, the manipulation of pure spin currents in nanostructures underlies the development of new spintronic devices. Here, we demonstrate the possibility to create switchable pure spin current sources, controlled by magnetic domain walls. When the domain wall is located at a given point of the magnetic circuit, a pure spin current is injected into a nonmagnetic wire. Using the reciprocal measurement configuration, we demonstrate that the proposed device can also be used as a pure spin current detector. Thanks to its simple geometry, this device can be easily implemented in spintronics applications; in particular, a single current source can be used both to induce the domain wall motion and to generate the spin signal.
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Affiliation(s)
- W Savero Torres
- INAC, CEA Grenoble , 17 avenue des Martyrs, 38054, Grenoble, France
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42
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Dilmé JF, Bellmunt S, Camacho M, Solà-Villà D, Romero JM, Escudero JR, Vila L. Influence of cardiovascular risk factors on levels of matrix metalloproteinases 2 and 9 in human abdominal aortic aneurysms. Eur J Vasc Endovasc Surg 2014; 48:374-81. [PMID: 24980077 DOI: 10.1016/j.ejvs.2014.05.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 05/27/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To evaluate the influence of cardiovascular risk factors on levels of matrix metalloproteinases (MMP) 2 and 9 in human abdominal aortic aneurysms (AAA). METHODS Aortic samples were collected from patients who underwent AAA repair (n = 89). Patients were stratified according to the maximum transverse aorta diameter: small diameter (<55 mm), moderate diameter (55-69.9 mm) and large diameter (≥70 mm). Aortic walls were studied using real-time PCR and immunohistochemistry. MMP-2, MMP-9, α-actin, CD45, and CD68 transcript levels were determined relative to β-actin. Quantitative data were expressed as median (IQ-range). RESULTS No differences were found in MMP-2 expression between the patient groups, which was mainly associated with vascular smooth muscle cells (VSMC); however, MMP-9 displayed the maximum level in the moderate-diameter group, associated with infiltrating macrophages. Current smoking (CS) and renal insufficiency (RI) significantly increased local levels of MMP-2 (CS 349.5 [219.5-414.1] vs. no-CS 184.4 [100.0-320.5]; p < .008; RI 286.8 [189.6-410.8] vs. no-RI 177.3 [99.3-326.9]; p = .047). Nevertheless, after stepwise linear regression analysis only CS remained as an independent variable predicting local levels of MMP-2 (p = .002). No risk factors influenced local levels of MMP-9. CONCLUSIONS The results show that local levels of MMP-2, an important factor for AAA development, were increased in current smoking AAA patients. MMP-2 was mainly associated with VSMC. It is suggested that MMP-2 could contribute significantly to the increased AAA growth rate observed in current smoking patients. These findings support inclusion of smokers in screening for aneurysmal disease, and emphasize the need for more aggressive monitoring of aneurysmal disease outside the surgical range in patients who smoke at the time of diagnosis and in those who continue to smoke during follow-up.
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Affiliation(s)
- J-F Dilmé
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain; Vascular Surgery Department, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
| | - S Bellmunt
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain; Vascular Surgery Department, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
| | - M Camacho
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain.
| | - D Solà-Villà
- Autonomous University of Barcelona, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
| | - J-M Romero
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain; Vascular Surgery Department, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
| | - J-R Escudero
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain; Vascular Surgery Department, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
| | - L Vila
- Angiology, Vascular Biology and Inflammation Laboratory, Institute of Biomedical Research (II-B Sant Pau), Barcelona, Spain
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43
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Jolly M, Toloza S, Bertoli A, Blazevic I, Vila L, Moldovan I, Torralba K, Kaya A, Goker B, Tezcan M, Haznedaroglu S, Bourre-Tessier J, Navarra S, Wallace D, Weisman M, Clarke A, Alarcon G, Mok C. FRI0398 Disease Specific Quality of Life in Patients with Lupus Nephritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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44
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Rojas-Sánchez JC, Reyren N, Laczkowski P, Savero W, Attané JP, Deranlot C, Jamet M, George JM, Vila L, Jaffrès H. Spin pumping and inverse spin Hall effect in platinum: the essential role of spin-memory loss at metallic interfaces. Phys Rev Lett 2014; 112:106602. [PMID: 24679318 DOI: 10.1103/physrevlett.112.106602] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Indexed: 06/03/2023]
Abstract
Through combined ferromagnetic resonance, spin pumping, and inverse spin Hall effect experiments in Co|Pt bilayers and Co|Cu|Pt trilayers, we demonstrate consistent values of ℓsfPt=3.4±0.4 nm and θSHEPt=0.056±0.010 for the respective spin diffusion length and spin Hall angle for Pt. Our data and model emphasize the partial depolarization of the spin current at each interface due to spin-memory loss. Our model reconciles the previously published spin Hall angle values and explains the different scaling lengths for the ferromagnetic damping and the spin Hall effect induced voltage.
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Affiliation(s)
- J-C Rojas-Sánchez
- INAC/SP2M, CEA-Université Joseph Fourier, F-38054 Grenoble, France and Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
| | - N Reyren
- Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
| | - P Laczkowski
- Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
| | - W Savero
- INAC/SP2M, CEA-Université Joseph Fourier, F-38054 Grenoble, France
| | - J-P Attané
- INAC/SP2M, CEA-Université Joseph Fourier, F-38054 Grenoble, France
| | - C Deranlot
- Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
| | - M Jamet
- INAC/SP2M, CEA-Université Joseph Fourier, F-38054 Grenoble, France
| | - J-M George
- Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
| | - L Vila
- INAC/SP2M, CEA-Université Joseph Fourier, F-38054 Grenoble, France
| | - H Jaffrès
- Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 91767 Palaiseau, France
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Ribot I, Lecha M, Peñalva A, Cots I, Sansano A, Martínez J, Prats R, López I, Torrejón S, Vila L. PP219-MON SIGNING A THERAPEUTIC COMMITMENT CONTRACT SUPPORTS WEIGHT LOSS. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60529-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Garcia Lorenzo J, Lopez Vilas M, Viros Porcuna D, Camacho M, Vila L, Leon Vintró X. PO-101: Prognostic Role of MMP-9 Expression in H&N Carcinoma Patients Treated with Radiotherapy or Chemoradiotherapy. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)34720-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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47
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Jain A, Rojas-Sanchez JC, Cubukcu M, Peiro J, Le Breton JC, Prestat E, Vergnaud C, Louahadj L, Portemont C, Ducruet C, Baltz V, Barski A, Bayle-Guillemaud P, Vila L, Attané JP, Augendre E, Desfonds G, Gambarelli S, Jaffrès H, George JM, Jamet M. Crossover from spin accumulation into interface states to spin injection in the germanium conduction band. Phys Rev Lett 2012; 109:106603. [PMID: 23005314 DOI: 10.1103/physrevlett.109.106603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Indexed: 06/01/2023]
Abstract
Electrical spin injection into semiconductors paves the way for exploring new phenomena in the area of spin physics and new generations of spintronic devices. However the exact role of interface states in the spin injection mechanism from a magnetic tunnel junction into a semiconductor is still under debate. In this Letter, we demonstrate a clear transition from spin accumulation into interface states to spin injection in the conduction band of n-Ge. We observe spin signal amplification at low temperature due to spin accumulation into interface states followed by a clear transition towards spin injection in the conduction band from 200 K up to room temperature. In this regime, the spin signal is reduced to a value compatible with the spin diffusion model. More interestingly, the observation in this regime of inverse spin Hall effect in germanium generated by spin pumping and the modulation of the spin signal by a gate voltage clearly demonstrate spin accumulation in the germanium conduction band.
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Affiliation(s)
- A Jain
- INAC/SP2M, Commissariat à l'Energie Atomique et aux Energies Alternatives and Université Joseph Fourier, F-38054 Grenoble, France
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Nguyen VD, Vila L, Laczkowski P, Marty A, Faivre T, Attané JP. Detection of domain-wall position and magnetization reversal in nanostructures using the magnon contribution to the resistivity. Phys Rev Lett 2011; 107:136605. [PMID: 22026884 DOI: 10.1103/physrevlett.107.136605] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Indexed: 05/31/2023]
Abstract
We show that magnetization reversal detection can be achieved at room temperature using the contribution of magnons to resistivity, in 50 nm wide nanowires with either perpendicular anisotropy (FePt) or in-plane magnetization (NiFe). Even though these nanowires are made from single layers, simple magnetoresistance measurements can be used to measure switching fields, or to detect the position of a domain wall along a nanowire. Surprisingly, in NiFe nanowires, and for applied fields nearly parallel to the wire, the magnon contribution is found to dominate the classical anisotropic magnetoresistance.
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49
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Cuevas JM, Alvarez-Larena A, Molins-Pujol AM, Piniella JF, Vila L. Exploring phases of a physiologically-active nitronyl nitroxide free radical. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311085631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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50
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Soriguer F, Santiago P, Vila L, Arena JM, Delgado E, Díaz Cadórniga F, Donnay S, Fernández Soto M, González-Romero S, Martul P, Puig Domingo M, Ares S, Escobar del Rey F, Morreale de Escobar G. Clinical dilemmas arising from the increased intake of iodine in the Spanish population and the recommendation for systematic prescription of potassium iodide in pregnant and lactating women (Consensus of the TDY Working Group of SEEN). J Endocrinol Invest 2009; 32:184-91. [PMID: 19411820 DOI: 10.1007/bf03345711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- F Soriguer
- Endocrinology and Nutrition Service, Carlos Haya University Hospital, Málaga, Spain
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