Controlling the Magnetic Anisotropy of the van der Waals Ferromagnet Fe3GeTe2 through Hole Doping

Se Young Park, Dong Seob Kim, Yu Liu, Jinwoong Hwang, Younghak Kim, Wondong Kim, Jae Young Kim, Cedomir Petrovic, Choongyu Hwang, Sung Kwan Mo, Hyung Jun Kim, Byoung Chul Min, Hyun Cheol Koo, Joonyeon Chang, Chaun Jang, Jun Woo Choi, Hyejin Ryu

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Identifying material parameters affecting properties of ferromagnets is key to optimized materials that are better suited for spintronics. Magnetic anisotropy is of particular importance in van der Waals magnets, since it not only influences magnetic and spin transport properties, but also is essential to stabilizing magnetic order in the two-dimensional limit. Here, we report that hole doping effectively modulates the magnetic anisotropy of a van der Waals ferromagnet and explore the physical origin of this effect. Fe3-xGeTe2 nanoflakes show a significant suppression of the magnetic anisotropy with hole doping. Electronic structure measurements and calculations reveal that the chemical potential shift associated with hole doping is responsible for the reduced magnetic anisotropy by decreasing the energy gain from the spin-orbit induced band splitting. Our findings provide an understanding of the intricate connection between electronic structures and magnetic properties in two-dimensional magnets and propose a method to engineer magnetic properties through doping.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalNano Letters
Volume20
Issue number1
DOIs
Publication statusPublished - 2020 Jan 8

Keywords

  • FeGeTe
  • doping effects
  • electronic structures
  • magnetic anisotropy
  • van der Waals ferromagnets

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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