We have investigated the magnetic properties of cobalt ferrite films epitaxially grown on MgAl2O4 (110) substrates. The unit cell of the cobalt ferrite film on the substrate with twofold surface symmetry is tetragonally distorted with c/a < 1, and the film exhibits uniaxial magnetic anisotropy parallel to the in-plane  orientation, which is similar to what is observed for films grown on MgO (001). The magnetic easy axis is parallel to the in-plane  direction and the magnetic hard axis is parallel to the out-of-plane  direction. Careful measurement of the magnetic torque indicates that the anisotropy energy can be described by a combination of uniaxial, fourfold, and demagnetization terms. The uniaxial term is comparable with that obtained for cobalt-ferrite films epitaxially grown on MgO (001).
- Ferrite films
- magnetic anisotropy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering