Electric-field control of magnetic properties for amorphous Fe2O3/LiTaO3 thin film

摘要

Amorphous-Fe2O3/LiTaO3 film can exhibit weak ferromagnetism, which may arise from some inhomogeneous, non-collinear, ferromagnetic ordered clusters with short range order. A perpendicular electric field acting upon amorphous-Fe2O3/LiTaO3 film could adjust its magnetic properties at 300 K. The saturation magnetization (M-s) of amorphous-Fe2O3/LiTaO3 film could be enhanced by a positive electric field and reduced by a negative electric field. The change induced by an electric field, which was reversible and non-volatile, may be connected with the migration effects of Li+. The oscillation of the curve for the M-s dependent on the voltage may reflect complicated processes. These remarkable and important findings may inspire more in-depth research, and lead to an alternative approach to future magneto-electronic devices.