TY - JOUR KW - Thin films KW - Nanostructured materials KW - Morphology KW - Elasticity KW - Polarization KW - Ferroelectric materials KW - Epitaxial ferroelectric KW - Magnetic domains KW - Magnetoelectric effects KW - Electric polarization KW - Barium titanate KW - Electrostriction KW - Magnetoelectric coupling KW - Phase-field model AU - J.X Zhang AU - Y.L Li AU - D.G Schlom AU - L.Q Chen AU - F Zavaliche AU - Ramamoorthy Ramesh AU - Q.X Jia AB - A phase-field model was developed for studying the magnetoelectric coupling effect in epitaxial ferroelectric and magnetic nanocomposite thin films. The model can simultaneously take into account the ferroelectric and magnetic domain structures, the electrostrictive and magnetostrictive effects, substrate constraint, as well as the long-range interactions such as magnetic, electric, and elastic interactions. As an example, the magnetic-field-induced electric polarization in BaTi O3 -Co Fe2 O4 nanocomposite film was analyzed. The effects of the film thickness, morphology of the nanocomposite, and substrate constraint on the degree of magnetoelectric coupling were discussed. © 2007 American Institute of Physics. BT - Applied Physics Letters DO - 10.1063/1.2431574 LA - eng M1 - 5 N1 - cited By 71 N2 - A phase-field model was developed for studying the magnetoelectric coupling effect in epitaxial ferroelectric and magnetic nanocomposite thin films. The model can simultaneously take into account the ferroelectric and magnetic domain structures, the electrostrictive and magnetostrictive effects, substrate constraint, as well as the long-range interactions such as magnetic, electric, and elastic interactions. As an example, the magnetic-field-induced electric polarization in BaTi O3 -Co Fe2 O4 nanocomposite film was analyzed. The effects of the film thickness, morphology of the nanocomposite, and substrate constraint on the degree of magnetoelectric coupling were discussed. © 2007 American Institute of Physics. PY - 2007 T2 - Applied Physics Letters TI - Phase-field model for epitaxial ferroelectric and magnetic nanocomposite thin films VL - 90 SN - 00036951 ER -