Magnetism Control Of Fega/Bto Thin Films By Electric-Field

Controlling the magnetism by means of electric fields is a key issue for the future development of low-power spintronics 1 . Usually, electric-field can control the magnetic materials by oxide-gate structures 2 . But this approach has a low regulatory capacity drawback than a way of controlled on BaTiO 3 (BTO) by the magnetoelectricity coupling, such as the experiments of FeRh/BaTiO 3 3 , BaTiO 3 /La 0.67 Sr 0.33 MnO 4 and Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 /Co 40 Fe 40 B 20 5 . FeGa alloy and BTO oxide are laminated to form heterostructure for high magnetoelectricity 6 . Ga could contribute to preferential magnetization along the direction in FeGa alloys and thus create anisotropy in the material, which is higher than the pure Fe 7 . Here we report the magnetic control of FeGa thin films on BaTiO substrate by electric field.