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Вид документа : Статья из журнала
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Автор(ы) : Averyanov D. V., Sokolov, Ivan S., Platunov M. S., Wilhelm, Fabrice, Rogalev, Andrei, Gargiani, Pierluigi, Valvidares, Manuel, Jaouen, Nicolas, Parfenov, Oleg E., Taldenkov, Alexander N., Karateev, Igor A., Tokmachev, Andrey M., Storchak V. G.
Заглавие : Competing magnetic states in silicene and germanene 2D ferromagnets
Место публикации : Nano Res. - 2020. - Vol. 13, Is. 12. - P.3396-3402. - ISSN 1998-0124, DOI 10.1007/s12274-020-3027-y. - ISSN 1998-0000(eISSN)
Примечания : Cited References: 58. - This work was supported by National Research Center (NRC) "Kurchatov Institute" (No. 1359, characterization) and the Russian Science Foundation (No. 19-19-00009 (synthesis) and No. 20-79-10028 (magnetization measurements)). D. V. A. also acknowledges support from the President's scholarship (SP 1398.2019.5). The measurements have been carried out using equipment of the resource centers of electrophysical and electron microscopy techniques in NRC "Kurchatov Institute"
Предметные рубрики: RAY CIRCULAR-DICHROISM
ABSORPTION
Аннотация: Two-dimension (2D) magnets have recently developed into a class of stoichiometric materials with prospective applications in ultra-compact spintronics and quantum computing. Their functionality is particularly rich when different magnetic orders are competing in the same material. Metalloxenes REX2 (RE = Eu, Gd; X = Si, Ge), silicene or germanene — heavy counterparts of graphene — coupled with a layer of rare-earth metals, evolve from three-dimension (3D) antiferromagnets in multilayer structures to 2D ferromagnets in a few monolayers. This evolution, however, does not lead to fully saturated 2D ferromagnetism, pointing at a possibility of coexisting/competing magnetic states. Here, REX2 magnetism is explored with element-selective X-ray magnetic circular dichroism (XMCD). The measurements are carried out for GdSi2, EuSi2, GdGe2, and EuGe2 of different thicknesses down to 1 monolayer employing K absorption edges of Si and Ge as well as M and L edges of the rare-earths. They access the magnetic state in REX2 and determine the seat of magnetism, orbital, and spin contributions to the magnetic moment. High-field measurements probe remnants of the bulk antiferromagnetism in 2D REX2. The results provide a new platform for studies of complex magnetic structures in 2D materials.
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