Inhomogeneous magnetostriction states in uniaxial ferromagnetic films |
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Authors: | Yu I Bespyatykh I E Dikshtein |
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Institution: | (1) Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 141120 Fryazino, Moscow District, Russia |
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Abstract: | Surface magnetoelastic Love waves and nonuniform distributions of the magnetization and elastic strains are investigated in
a uniaxial ferromagnetic film on a massive nonmagnetic substrate in a tangential external magnetic field. A new inhomogeneous
phase is predicted having spatial modulation of the order parameter, arising from magnetostrictive coupling of the magnetization
with lattice strains near the interface of the magnetoelastic and elastic media. It is shown that, at some critical magnetic
field H
c, different from the orientational transition field in an isolated sample, a magnetoelastic Love wave propagating parallel
to the magnetization vector in the film plane becomes unstable. The frequency and group velocity of the wave vanish at wave
number k=k
c≠0 and the wave freezes, forming a domain structure localized in the film and adjoining substrate.
Fiz. Tverd. Tela (St. Petersburg) 41, 665–671 (April 1999) |
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Keywords: | |
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