Magnetic resonance of the interface boundary in a ferromagnetic film with modulated anisotropy under the orientational phase transition
Yu.I. Dzhezherya1,2, D.P. Azarkh2, E.S. Klimuk2, and A.O.Khrebtov1
1Institute of Magnetism, NASU, 36-B Vernadskii Ave., Kiev 03142, Ukraine
2National Technical University of Ukraine “KPI”, 37 Peremogy Ave., Kiev 03056, Ukraine
Received April 19, 2017. revised June 21, 2017
On Landau–Lifshitz equations of the magnetization dynamics is described the formation features of the interface boundary under conditions of the spatial modulation of the anisotropy constant of the film thickness. Lagrangian equations for collective variables of the magnetization field are obtained, on the basis of which the dynamics of the oscillations of the interphase boundary in an alternating magnetic field is investigated. It is shown that under certain conditions, the manifestations of the resonance of the interface are extremely sensitive to the direction and magnitude of the external magnetic field. In connection with this, it is natural to use this system as a highly directional magnetic field detector.
PACS: 75.70.Ak Magnetic properties of monolayers and thin films;
Key words: interphase boundary, ferromagnetic ferrite-garnet film, the magnetic orientation phase transition.
Published online: November 28, 2017