Ferroelectric Control of Magnetism in BaTiO₃/Fe Heterostructures via Interface Strain Coupling

Authors

Sarbeswar Sahoo, University of Nebraska-LincolnFollow
Srinivas Polisetty, University of Nebraska-LincolnFollow
Chun-Gang Duan, University of Nebraska-LincolnFollow
Sitaram S. Jaswal, University of Nebraska-LincolnFollow
Evgeny Y. Tsymbal, University of Nebraska-LincolnFollow
Christian Binek, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

10-30-2007

Citation

Physical Review B (2007) 76: 092108

doi: 10.1103/PhysRevB.76.092108

Comments

Copyright © 2007, American Physical Society. Used by permission

Abstract

Reversible control of magnetism is reported for a Fe thin film in proximity of a BaTiO₃ single crystal. Large magnetization changes emerge in response to ferroelectric switching and structural transitions of BaTiO₃ controlled by applied electric fields and temperature, respectively. Interface strain coupling is the primary mechanism altering the induced magnetic anisotropy. As a result, coercivity changes up to 120% occur between the various structural states of BaTiO₃. Up to 20% coercivity change is achieved via electrical control at room temperature. Our all solid state ferroelectric-ferromagnetic heterostructures open viable possibilities for technological applications.