Epitaxial Growth and Domain Structure Imaging of Kagome Magnet Fe${}_3$Sn${}_2$

Abstract

Magnetic materials with kagome crystal structure exhibit rich physics such as frustrated magnetism, skyrmion formation, topological flat bands, and Dirac/Weyl points. Until recently, most studies on kagome magnets have been performed on bulk crystals or polycrystalline films. Here we report the synthesis of high-quality epitaxial films of topological kagome magnet Fe${}_3$Sn${}_2$ by atomic layer molecular beam epitaxy. Structural and magnetic characterization of Fe${}_3$Sn${}_2$ on epitaxial Pt(111) identifies highly ordered films with c-plane orientation and an in-plane magnetic easy axis. Studies of the local magnetic structure by anomalous Nernst effect imaging reveals in-plane oriented micrometer size domains. The realization of high-quality films by atomic layer molecular beam epitaxy opens the door to explore the rich physics of this system and investigate novel spintronic phenomena by interfacing Fe${}_3$Sn${}_2$ with other materials.

arXiv comment6 pages, 5 figures

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