Abstract
The treatment of perpendicular electric field upon γ-Fe2O3/MgO film at room temperature could adjust the magnetic properties (saturation magnetization, magnetic remanence, coercivity, and saturation magnetizing field) of the film. The enhancement of saturation magnetization after the treatment of electric field may be connected with the combined shift effects of Mg ions from MgO to γ-Fe2O3 and O2− ions from γ-Fe2O3 to MgO. The negative magnetoresistance of the γ-Fe2O3/MgO film also enhances with the treatment of perpendicular electric field at room temperature, possibly due to the increasing of electron hopping rate between Fe2+ and Fe3+.
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