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Article

Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature

1
Institute of Physics, Maria Curie-Sklodowska University, 20-031 Lublin, Poland
2
Wigner Research Center for Physics, Institute for Solid State Physics and Optics, Konkoly-Thege M. Str. 29-33, 1121 Budapest, Hungary
3
MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, Rerrich B. tér 1, 6720 Szeged, Hungary
4
Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki út 8, 1111 Budapest, Hungary
5
Department of Chemistry, Ludwig Maximilians University, 81377 Munich, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Jordi Sort and Dominique de Caro
Materials 2022, 15(3), 1019; https://doi.org/10.3390/ma15031019
Received: 9 November 2021 / Revised: 9 January 2022 / Accepted: 26 January 2022 / Published: 28 January 2022
(This article belongs to the Special Issue Multilayer and Hybrid Two-Dimensional Materials)
The crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses hexagonal symmetry and reveals a ferromagnetic order at room temperature. We experimentally demonstrate the possibility of tuning the Curie temperature and the magnitude of magnetization of the Fe monolayer by capping with Au. Taking into account several structural models, the calculation results mostly show ferromagnetic states with enhanced magnetic moments of Fe atoms compared to their bulk value and a further increase in their value after covering with Au. The theoretically calculated Curie temperatures are in fair agreement with those obtained in the experiments. The calculations, furthermore, found evidence for the presence of frustrated isotropic Fe–Fe exchange interactions, and a discussion of the structural effects on the magnetic properties is provided herein. View Full-Text
Keywords: ultrathin ferromagnetic films; Fe; SPLEEM; DFT ultrathin ferromagnetic films; Fe; SPLEEM; DFT
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MDPI and ACS Style

Zdyb, R.; Palotás, K.; Simon, E.; Jaroch, T.; Korczak, Z. Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature. Materials 2022, 15, 1019. https://doi.org/10.3390/ma15031019

AMA Style

Zdyb R, Palotás K, Simon E, Jaroch T, Korczak Z. Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature. Materials. 2022; 15(3):1019. https://doi.org/10.3390/ma15031019

Chicago/Turabian Style

Zdyb, Ryszard, Krisztián Palotás, Eszter Simon, Tomasz Jaroch, and Zbigniew Korczak. 2022. "Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature" Materials 15, no. 3: 1019. https://doi.org/10.3390/ma15031019

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