Electrically controllable magnetic properties of Fe-doped GaSe monolayer
Journal
Journal of Physics D: Applied Physics
Journal Volume
15
Journal Issue
17
Date Issued
2019
Author(s)
Abstract
Electrically controllable magnetic properties in 2D materials are promising for the development of the next-generation of magnetic and spintronic applications. In this paper, a theoretical design of magnetic property modulation in an Fe-doped GaSe monolayer is provided based on systematical density functional theory calculations. A ferromagnetic coupling between Fe and the vicinal Ga atom in the Fe-doped GaSe monolayer is found to be regulated to an antiferromagnetic coupling at a critical electric field of 0.2 V ? -1 , accompanied with the change of the magnetic moment and the spin polarization. By calculating the magnetization energy, total energy, charge redistribution, and orbital-decomposed densities of states, the significant effect of the electric field on the magnetic configuration and magnetic anisotropy in the Fe-doped GaSe monolayer is analyzed, and the related physics mechanism is revealed. The electric-field tunable magnetic properties offer a promising application in magnetic and spintronic devices. ? 2019 IOP Publishing Ltd.
Subjects
Density functional theory; Electric fields; Gallium compounds; Iron compounds; Layered semiconductors; Magnetic anisotropy; Magnetic moments; Selenium compounds; Spin polarization; Antiferromagnetic coupling; Critical electric field; external electric feld; Fe-doped; Ferromagnetic coupling; Magnetic configuration; Perpendicular magnetic anisotropy; Spintronic applications; Monolayers
Type
journal article