Fizika Nizkikh Temperatur: Volume 44, Number 1 (January 2018), p. 59-65    ( to contents , go back )

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
E-mail: dui_kpi@ukr.net

Received April 19, 2017. revised June 21, 2017

Abstract

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;
PACS: 76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance;
PACS: 76.60.Es Relaxation effects;
PACS: 77.55.Px Epitaxial and superlattice films.

Key words: interphase boundary, ferromagnetic ferrite-garnet film, the magnetic orientation phase transition.

Published online: November 28, 2017

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