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Modifications of magnetic anisotropy of Fe3GeTe2 by the electric field effect.
- Source :
-
Applied Physics Letters . 3/2/2020, Vol. 116 Issue 9, p1-5. 5p. 1 Diagram, 3 Graphs. - Publication Year :
- 2020
-
Abstract
- The Fe 3 GeTe 2 material is the only metallic ferromagnet with a van der Waals layered structure, which has been used as a ferromagnetic electrode in spintronic devices. The tunability of magnetic properties of few-layer Fe 3 GeTe 2 by electrostatic gating is demonstrated in experiments. In this work, we present a theoretical investigation of the electric field effect on the magnetic anisotropy of the Fe 3 GeTe 2 monolayer using the first-principles approach. The calculated magnetic anisotropy energy exhibits strongly oscillating behavior at the electron-doping side, in strong contrast to the hole-doping side. The significant variation of the magnetic anisotropy energy vs electron doping concentration agrees well with experimental results. While the rigid-band approximation works well at the hole-doping side, electron doping induces significant changes in the electronic structure near the Fermi energy. The analysis of the electronic structure shows that the occupation and splitting of the Te(pz)-Fe( d z 2 ) bond states play a critical role in modifying the magnetic anisotropy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 116
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 142131603
- Full Text :
- https://doi.org/10.1063/1.5144032