Interaction of Elastic and Spin Waves in a Uniaxial Ferromagnet

  • A. G. Danilevich Institute of Magnetism, Nat. Acad. of Sci. of Ukraine and Ministry of Education and Science, Youth and Sport of Ukraine,National Technical University of Ukraine “Kyiv Polytechnic Institute”
Keywords: magnetoelastic interaction, dispersion law, uniaxial ferromagnet, elastic modulus

Abstract

The dispersion laws of coupled magnetoelastic waves have been calculated for all ground states in a uniaxial ferromagnet. The magnetoelastic interaction is shown to take place not for all sound modes in those ground states. The obtained dispersion laws testify that the magnetoelastic interaction coefficient depends on both the magnetization direction and the wave vector direction. It is demonstrated that the magnetoelastic interaction between sound and spin waves in the uniaxial ferromagnet is characterized by the constants B44 and B66, whereas the other magnetoelastic constants govern only the formation of a magnetoelastic gap in the spectrum of coupled waves.

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Published
2019-01-10
How to Cite
Danilevich, A. (2019). Interaction of Elastic and Spin Waves in a Uniaxial Ferromagnet. Ukrainian Journal of Physics, 60(11), 1126. https://doi.org/10.15407/ujpe60.11.1126
Section
Solid matter