MAGNETIC ORDER IN THE SANDWICH STRUCTURE OF THE COMPOUND Fe3GeTe2

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Resumo

Magnetic ordering of the sandwich structure of the Fe3GeTe2 compound is investigated. Two cases are considered. In the first case, the interaction between the layers containing iron atoms is neglected. In the second case, such interaction is considered small. It is shown that in the first case, a phase transition to a ferromagnetic state of the Ising type with a one-component order parameter takes place in two-dimensional layers containing only iron atoms. The magnetic moment is oriented along the z axis. The assumption is used that in the Fe/Ge layer, the exchange interaction of iron atoms is indirect through germanium atoms and antiferromagnetic. Long-range magnetic order is absent in this plane, but antiferromagnetic fluctuations of the transverse spin wave type are present. When the interaction between the layers is taken into account, a long-range ferromagnetic order will appear in the system, realized on the layers containing only iron atoms. Antiferromagnetic fluctuations will coexist with ferromagnetism.

Sobre autores

Vladimir Men'shenin

M.N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences

Autor responsável pela correspondência
Email: menshenin@imp.uran.ru
ORCID ID: 0000-0003-1455-965X
Código SPIN: 1931-6864
Scopus Author ID: 57217591141
Researcher ID: K-3344-2013

Doctor of Physical and Mathematical Sciences, Chief Researcher, Laboratory of Theoretical Physics

Rússia, Yekaterinburg, 620108 Russia

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