When two is enough: On the origin of diverse crystal structures and physical properties in the Fe-Ge systemстатья
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2019 г.
Аннотация:The Fe-Ge system resides among the richest binary intermetallic systems both in terms of the number of intermediate phases and diversity of crystal structures and magnetic properties. Although crystal structures of the Fe-Ge binary phases are different, they are closely related to each other with an evolution of Ge polyhedra being the cornerstone that weld them together. Upon transition to the Ge rich side the initial Ge polyhedron gradually loses vertex Fe atoms in a diverse manner creating a variety of different iron frameworks from 3-dimensional ones to practically isolated Fe atoms. This, along with strong electron correlations provided by Fe-Fe and Fe-Ge interactions, leads to a broadness of physical properties varying from metallic ferromagnets to metallic antiferromagnets with complex magnetic structures and ultimately to a non-magnetic insulator. This minireview surveys the crystal and electronic structures of binary compounds of the Fe–Ge system and relationships with their transport and magnetic properties.