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Fernandez L, Blanco-Rey M, Castrillo-Bodero R, Ilyn M, Ali K, Turco E, Corso M, Ormaza M, Gargiani P, Valbuena MA, Mugarza A, Moras P, Sheverdyaeva PM, Kundu AK, Jugovac M, Laubschat C, Ortega JE, Schiller F. Correction: Influence of 4f filling on electronic and magnetic properties of rare earth-Au surface compounds. Nanoscale 2021; 13:20704. [PMID: 34874396 DOI: 10.1039/d1nr90260a] [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
Correction for 'Influence of 4f filling on electronic and magnetic properties of rare earth-Au surface compounds' by L. Fernandez et al., Nanoscale, 2020, 12, 22258-22267, DOI: 10.1039/D0NR04964F.
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Affiliation(s)
- L Fernandez
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Blanco-Rey
- Universidad del País Vasco UPV-EHU, Dpto. de Polímeros y Materiales Avanzados: Física, Química y Tecnología, 20018 San Sebastián, Spain
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
| | - R Castrillo-Bodero
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Ilyn
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - K Ali
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - E Turco
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Corso
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Ormaza
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
| | - P Gargiani
- ALBA Synchrotron Light Source, Carretera BP 1413 km 3.3, 08290 Cerdanyola del Vallès, Spain
| | - M A Valbuena
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- IMDEA Nanociencia, 28049 Madrid, Spain
| | - A Mugarza
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08070 Barcelona, Spain
| | - P Moras
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - P M Sheverdyaeva
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - Asish K Kundu
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - M Jugovac
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - C Laubschat
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - J E Ortega
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - F Schiller
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
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Fernandez L, Blanco-Rey M, Castrillo-Bodero R, Ilyn M, Ali K, Turco E, Corso M, Ormaza M, Gargiani P, Valbuena MA, Mugarza A, Moras P, Sheverdyaeva PM, Kundu AK, Jugovac M, Laubschat C, Ortega JE, Schiller F. Influence of 4f filling on electronic and magnetic properties of rare earth-Au surface compounds. Nanoscale 2020; 12:22258-22267. [PMID: 33146198 DOI: 10.1039/d0nr04964f] [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
One-atom-thick rare-earth/noble metal (RE-NM) compounds are attractive materials to investigate two-dimensional magnetism, since they are easy to synthesize into a common RE-NM2 structure with high crystal perfection. Here we perform a comparative study of the GdAu2, HoAu2, and YbAu2 monolayer compounds grown on Au(111). We find the same atomic lattice quality and moiré superlattice periodicity in the three cases, but different electronic properties and magnetism. The YbAu2 monolayer reveals the characteristic electronic signatures of a mixed-valence configuration in the Yb atom. In contrast, GdAu2 and HoAu2 show the trivalent character of the rare-earth and ferromagnetic transitions below 22 K. Yet, the GdAu2 monolayer has an in-plane magnetic easy-axis, versus the out-of-plane one in HoAu2. The electronic bands of the two trivalent compounds are very similar, while the divalent YbAu2 monolayer exhibits different band features. In the latter, a strong 4f-5d hybridization is manifested in neatly resolved avoided crossings near the Fermi level. First principles theory points to a residual presence of empty 4f states, explaining the fluctuating valence of Yb in the YbAu2 monolayer.
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Affiliation(s)
- L Fernandez
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Blanco-Rey
- Universidad del País Vasco UPV-EHU, Dpto. de Polímeros y Materiales Avanzados: Física, Química y Tecnología, 20018 San Sebastián, Spain
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
| | - R Castrillo-Bodero
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Ilyn
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - K Ali
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - E Turco
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Corso
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - M Ormaza
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
| | - P Gargiani
- ALBA Synchrotron Light Source, Carretera BP 1413 km 3.3, 08290 Cerdanyola del Vallès, Spain
| | - M A Valbuena
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- IMDEA Nanociencia, 28049 Madrid, Spain
| | - A Mugarza
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08070 Barcelona, Spain
| | - P Moras
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - P M Sheverdyaeva
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - Asish K Kundu
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - M Jugovac
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 34149 Trieste, Italy
| | - C Laubschat
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
| | - J E Ortega
- Universidad del País Vasco UPV-EHU, Dpto. Física Aplicada I, 20018 San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
| | - F Schiller
- Donostia International Physics Center, 20018 Donostia-San Sebastián, Spain.
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, 20018 San Sebastián, Spain
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Ormaza M, Fernández L, Ilyn M, Magaña A, Xu B, Verstraete MJ, Gastaldo M, Valbuena MA, Gargiani P, Mugarza A, Ayuela A, Vitali L, Blanco-Rey M, Schiller F, Ortega JE. High Temperature Ferromagnetism in a GdAg2 Monolayer. Nano Lett 2016; 16:4230-5. [PMID: 27247988 DOI: 10.1021/acs.nanolett.6b01197] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Materials that exhibit ferromagnetism, interfacial stability, and tunability are highly desired for the realization of emerging magnetoelectronic phenomena in heterostructures. Here we present the GdAg2 monolayer alloy, which possesses all such qualities. By combining X-ray absorption, Kerr effect, and angle-resolved photoemission with ab initio calculations, we have investigated the ferromagnetic nature of this class of Gd-based alloys. The Curie temperature can increase from 19 K in GdAu2 to a remarkably high 85 K in GdAg2. We find that the exchange coupling between Gd atoms is barely affected by their full coordination with noble metal atoms, and instead, magnetic coupling is effectively mediated by noble metal-Gd hybrid s,p-d bands. The direct comparison between isostructural GdAu2 and GdAg2 monolayers explains how the higher degree of surface confinement and electron occupation of such hybrid s,p-d bands promote the high Curie temperature in the latter. Finally, the chemical composition and structural robustness of the GdAg2 alloy has been demonstrated by interfacing them with organic semiconductors or magnetic nanodots. These results encourage systematic investigations of rare-earth/noble metal surface alloys and interfaces, in order to exploit them in magnetoelectronic applications.
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Affiliation(s)
- M Ormaza
- Universidad del País Vasco , Dpto. Física Aplicada I, E-20018 San Sebastián, Spain
- IPCMS, CNRS UMR 7504, Université de Strasbourg , 67034 Strasbourg, France
| | - L Fernández
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität , 35032 Marburg, Germany
- Donostia International Physics Center , E-20018 Donostia-San Sebastián, Spain
| | - M Ilyn
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
| | - A Magaña
- Universidad del País Vasco , Dpto. Física Aplicada I, E-20018 San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
| | - B Xu
- Université de Liège , Institut de Physique and European Theoretical Spectroscopy Facility (ETSF), allée du 6 août, 17 Sart-Tilman, B-4000 Liège, Belgium
| | - M J Verstraete
- Université de Liège , Institut de Physique and European Theoretical Spectroscopy Facility (ETSF), allée du 6 août, 17 Sart-Tilman, B-4000 Liège, Belgium
| | - M Gastaldo
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - M A Valbuena
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology , Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - P Gargiani
- ALBA Synchrotron Light Source , Carretera BP 1413 km 3.3, E-08290 Cerdanyola del Vallès, Spain
| | - A Mugarza
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology , Campus UAB, Bellaterra, 08193 Barcelona, Spain
- ICREA, Institució Catalana de Recerca i Estudis Avançats , Lluis Companys 23, 08010 Barcelona, Spain
| | - A Ayuela
- Donostia International Physics Center , E-20018 Donostia-San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
| | - L Vitali
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain
| | - M Blanco-Rey
- Donostia International Physics Center , E-20018 Donostia-San Sebastián, Spain
- Universidad del País Vasco , Dpto. Física Materiales, E-20018 San Sebastián, Spain
| | - F Schiller
- Fachbereich Physik und Zentrum für Materialwissenschaften, Philipps-Universität , 35032 Marburg, Germany
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
| | - J E Ortega
- Universidad del País Vasco , Dpto. Física Aplicada I, E-20018 San Sebastián, Spain
- Donostia International Physics Center , E-20018 Donostia-San Sebastián, Spain
- Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center , E-20018 San Sebastián, Spain
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García I, Echeberria J, Kakazei GN, Golub VO, Saliuk OY, Ilyn M, Guslienko KY, González JM. Evolution of the magnetic properties of Co10Cu90 nanoparticles prepared by wet chemistry with thermal annealing. J Nanosci Nanotechnol 2012; 12:7529-7534. [PMID: 23035510 DOI: 10.1166/jnn.2012.6540] [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: 06/01/2023]
Abstract
Nanoparticles of Co10Cu90 alloy have been prepared by sonochemical wet method. According to transmission electron microscopy, bimetallic particles with typical diameter of 50-100 nm consisting of nanocrystallites with average diameter of 15-20 nm were obtained. The samples were annealed at 300 degrees C and 450 degrees C. Zero field cooled and field cooled temperature dependences of magnetization in the temperature range of 5-400 K at 50 Oe, as well as magnetization hysteresis loops at 15, 100 and 305 K were measured by vibrating sample magnetometry. Presence of antiferromagnetic phase, most probably of the oxide Co3O4, was observed in as-prepared sample. The lowest coercivity was found for the CoCu sample annealed at-300 degrees C, whereas for as prepared sample and the one annealed at 450 degrees C it was significantly higher. The samples were additionally probed by continuous wave ferromagnetic resonance at room, temperature using a standard X-band electron spin resonance spectrometer. A good correspondence between evolution of the coercivity and the microwave resonance fields with annealing temperature was observed.
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Affiliation(s)
- I García
- CIDETEC-Centro de Tecnologías Electroquímicas, Parque Tecnológico de San Sebastián, Paseo Miramón, 196, 20009 Donostia-San Sebastián, Spain
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