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Mathialagan SK, Parreiras SO, Tenorio M, Černa L, Moreno D, Muñiz-Cano B, Navío C, Valvidares M, Valbuena MA, Urgel JI, Gargiani P, Miranda R, Camarero J, Martínez JI, Gallego JM, Écija D. On-Surface Synthesis of Organolanthanide Sandwich Complexes. Adv Sci (Weinh) 2024:e2308125. [PMID: 38610109 DOI: 10.1002/advs.202308125] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/23/2024] [Indexed: 04/14/2024]
Abstract
The synthesis of lanthanide-based organometallic sandwich compounds is very appealing regarding their potential for single-molecule magnetism. Here, it is exploited by on-surface synthesis to design unprecedented lanthanide-directed organometallic sandwich complexes on Au(111). The reported compounds consist of Dy or Er atoms sandwiched between partially deprotonated hexahydroxybenzene molecules, thus introducing a distinct family of homoleptic organometallic sandwiches based on six-membered ring ligands. Their structural, electronic, and magnetic properties are investigated by scanning tunneling microscopy and spectroscopy, X-ray absorption spectroscopy, X-ray linear and circular magnetic dichroism, and X-ray photoelectron spectroscopy, complemented by density functional theory-based calculations. Both lanthanide complexes self-assemble in close-packed islands featuring a hexagonal lattice. It is unveiled that, despite exhibiting analogous self-assembly, the erbium-based species is magnetically isotropic, whereas the dysprosium-based compound features an in-plane magnetization.
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Affiliation(s)
| | - Sofia O Parreiras
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | - Maria Tenorio
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | - Lenka Černa
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
- Brno University of Technology, Brno, 60190, Czech Republic
| | - Daniel Moreno
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | - Beatriz Muñiz-Cano
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | - Cristina Navío
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | | | - Miguel A Valbuena
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
| | - José I Urgel
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
- Unidad de Nanomateriales Avanzados, IMDEA Nanoscience, Unidad Asociada al CSIC por el ICMM, Madrid, 28049, Spain
| | | | - Rodolfo Miranda
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
- Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Julio Camarero
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
- Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - José I Martínez
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Cantoblanco, Madrid, 28049, Spain
| | - José M Gallego
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Cantoblanco, Madrid, 28049, Spain
| | - David Écija
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanoscience), Madrid, 28049, Spain
- Unidad de Nanomateriales Avanzados, IMDEA Nanoscience, Unidad Asociada al CSIC por el ICMM, Madrid, 28049, Spain
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González A, García-Gomez A, Zhukova V, Corte-Leon P, Ipatov M, Blanco JM, Gonzalez J, Zhukov A. Optimization of Magnetoimpedance Effect and Magnetic Properties of Fe-Rich Glass-Coated Microwires by Annealing. Sensors (Basel) 2023; 23:7481. [PMID: 37687937 PMCID: PMC10490706 DOI: 10.3390/s23177481] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/18/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023]
Abstract
As-prepared Fe-rich microwires with perfectly rectangular hysteresis loops present magnetization reversal through fast domain wall propagation, while the giant magnetoimpedance (GMI) effect in Fe-rich microwires is rather low. However, the lower cost of Fe-rich microwires makes them attractive for magnetic sensors applications. We studied the effect of conventional (furnace) annealing and Joule heating on magnetic-propertied domain wall (DW) dynamics and the GMI effect in two Fe microwires with different geometries. We observed that magnetic softness, GMI effect and domain wall (DW) dynamics can be substantially improved by appropriate annealing. Observed experimental results are discussed considering the counterbalance between the internal stresses relaxation and induced magnetic anisotropy associated with the presence of an Oersted magnetic field during Joule heating.
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Affiliation(s)
- Alvaro González
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Alfonso García-Gomez
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Valentina Zhukova
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Paula Corte-Leon
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Mihail Ipatov
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Juan Maria Blanco
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Julian Gonzalez
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Arcady Zhukov
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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Salaheldeen M, Wederni A, Ipatov M, Zhukova V, Zhukov A. Carbon-Doped Co 2MnSi Heusler Alloy Microwires with Improved Thermal Characteristics of Magnetization for Multifunctional Applications. Materials (Basel) 2023; 16:5333. [PMID: 37570037 PMCID: PMC10419722 DOI: 10.3390/ma16155333] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/18/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023]
Abstract
In the current work, we illustrate the effect of adding a small amount of carbon to very common Co2MnSi Heusler alloy-based glass-coated microwires. A significant change in the magnetic and structure structural properties was observed for the new alloy Co2MnSiC compared to the Co2MnSi alloy. Magneto-structural investigations were performed to clarify the main physical parameters, i.e., structural and magnetic parameters, at a wide range of measuring temperatures. The XRD analysis illustrated the well-defined crystalline structure with average grain size (Dg = 29.16 nm) and a uniform cubic structure with A2 type compared to the mixed L21 and B2 cubic structures for Co2MnSi-based glass-coated microwires. The magnetic behavior was investigated at a temperature range of 5 to 300 K and under an applied external magnetic field (50 Oe to 20 kOe). The thermomagnetic behavior of Co2MnSiC glass-coated microwires shows a perfectly stable behavior for a temperature range from 300 K to 5 K. By studying the field cooling (FC) and field heating (FH) magnetization curves at a wide range of applied external magnetic fields, we detected a critical magnetic field (H = 1 kOe) where FC and FH curves have a stable magnetic behavior for the Co2MnSiC sample; such stability was not found in the Co2MnSi sample. We proposed a phenomenal expression to estimate the magnetization thermal stability, ΔM (%), of FC and FH magnetization curves, and the maximum value was detected at the critical magnetic field where ΔM (%) ≈ 98%. The promising magnetic stability of Co2MnSiC glass-coated microwires with temperature is due to the changing of the microstructure induced by the addition of carbon, as the A2-type structure shows a unique stability in response to variation in the temperature and the external magnetic field. In addition, a unique internal mechanical stress was induced during the fabrication process and played a role in controlling magnetic behavior with the temperature and external magnetic field. The obtained results make Co2MnSiC a promising candidate for magnetic sensing devices based on Heusler glass-coated microwires.
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Affiliation(s)
- Mohamed Salaheldeen
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain; (A.W.); (M.I.); (V.Z.)
- Department of Applied Physics I, EIG, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
- Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Asma Wederni
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain; (A.W.); (M.I.); (V.Z.)
- Department of Applied Physics I, EIG, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Mihail Ipatov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain; (A.W.); (M.I.); (V.Z.)
- Department of Applied Physics I, EIG, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Valentina Zhukova
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain; (A.W.); (M.I.); (V.Z.)
- Department of Applied Physics I, EIG, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Arcady Zhukov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain; (A.W.); (M.I.); (V.Z.)
- Department of Applied Physics I, EIG, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
- IKERBASQUE—Basque Foundation for Science, 48011 Bilbao, Spain
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Salaheldeen M, Wederni A, Ipatov M, Zhukova V, Lopez Anton R, Zhukov A. Enhancing the Squareness and Bi-Phase Magnetic Switching of Co 2FeSi Microwires for Sensing Application. Sensors (Basel) 2023; 23:s23115109. [PMID: 37299836 DOI: 10.3390/s23115109] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/13/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023]
Abstract
In the current study we have obtained Co2FeSi glass-coated microwires with different geometrical aspect ratios, ρ = d/Dtot (diameter of metallic nucleus, d and total diameter, Dtot). The structure and magnetic properties are investigated at a wide range of temperatures. XRD analysis illustrates a notable change in the microstructure by increasing the aspect ratio of Co2FeSi-glass-coated microwires. The amorphous structure is detected for the sample with the lowest aspect ratio (ρ = 0.23), whereas a growth of crystalline structure is observed in the other samples (aspect ratio ρ = 0.30 and 0.43). This change in the microstructure properties correlates with dramatic changing in magnetic properties. For the sample with the lowest ρ-ratio, non-perfect square loops are obtained with low normalized remanent magnetization. A notable enhancement in the squareness and coercivity are obtained by increasing ρ-ratio. Changing the internal stresses strongly affects the microstructure, resulting in a complex magnetic reversal process. The thermomagnetic curves show large irreversibility for the Co2FeSi with low ρ-ratio. Meanwhile, if we increase the ρ-ratio, the sample shows perfect ferromagnetic behavior without irreversibility. The current result illustrates the ability to control the microstructure and magnetic properties of Co2FeSi glass-coated microwires by changing only their geometric properties without performing any additional heat treatment. The modification of geometric parameters of Co2FeSi glass-coated microwires allows to obtain microwires that exhibit an unusual magnetization behavior that offers opportunities to understand the phenomena of various types of magnetic domain structures, which is essentially helpful for designing sensing devices based on thermal magnetization switching.
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Affiliation(s)
- Mohamed Salaheldeen
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Asma Wederni
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Mihail Ipatov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Valentina Zhukova
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Ricardo Lopez Anton
- Department of Applied Physics, Regional Institute for Applied Scientific Research (IRICA), University of Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Arcady Zhukov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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