title: Exchange coupling driven omnidirectional rotatable anisotropy in ferrite doped CoFe thin film.
abstract: Isotropic magnetic materials with high resonant frequencies are useful for applications in microwave devices. Undoped CoFe thin films, as common soft magnetic materials with high saturation magnetization, show isotropic characteristics but no high frequency response. Here, we use ferrite doped CoFe thin film to realize a resonant frequency higher than 4.5 GHz at all orientations. The exchange coupling between ferrimagnet and ferromagnet is assumed to play a key role on the omnidirectional rotatable anisotropy.
authors.affiliation: Temasek Laboratories, National University of Singapore, Singapore 117411, Singapore.
authors.forename: Guozhi
authors.initials: G
authors.lastname: Chai
authors.forename: Nguyen N
authors.initials: NN
authors.lastname: Phuoc
authors.forename: C K
authors.initials: CK
authors.lastname: Ong
mesh_terms: D016880:Anisotropy; D003035:Cobalt / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D008872:Microwaves
chemical_list: D005290:Ferric Compounds; C001215:ferrite; D003035:Cobalt; D007501:Iron