Electric-field tuning of magnetic anisotropy in the artificial multiferroic fe3o4/pmn–pt heterostructure

Abstract

Modulation of the magnetic anisotropy by the electric field in epitaxial Fe3O4 /PMN–PT multiferroic heterostructure is studied, which shows that the coercive field of Fe3O4 thin films can be decreased from 368 to 113 Oe by applying an electric field in PMN–PT [011] direction. Meanwhile, most shift of ferromagnetic resonance (FMR) field Hr(ΔHr,[011]) can reach up to −483 Oe by applying an external electric field. The giant shift of Hr from 251 to 9681 Oe is obtained as the sample rotated from θ = 90° (H // [011] to θ = 0° (H // [100]) when the electric field was applied in Fe3O4 /PMN–PT heterostructure. (Image Appear). A giant shift of ferromagnetic resonance field was obtained by simultaneously applying an external electric field and a rotating sample along axes both parallel and perpendicular to the magnetic field.