Email this article Specificities of Spin Wave Focusing in EuO and EuS Crystals
- Authors: Bakharev S.M.1,2, Savchenko S.P.1, Tankeyev A.P.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the First President of Russia B. N. Yeltsin
- Issue: Vol 61, No 2 (2019)
- Pages: 117-126
- Section: Magnetism
- URL: https://journals.rcsi.science/1063-7834/article/view/204793
- DOI: https://doi.org/10.1134/S1063783419020045
- ID: 204793
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Abstract
Specificities of spin wave focusing in EuO and EuS crystals are studied. It is shown that spin wave focusing is absent in the long-wave approximation: it is observed only for wave vectors in the second half of the Brillouin zone (aq\( \gtrsim \) π, where a is the lattice constant and q is the magnitude of the wave vector). It was found that, for EuO and EuS crystals, the directions of spin wave focusing differ due to the different signs of the exchange integrals responsible for the exchange interaction of the magnetic moment with the second neighbors. The directions along which a magnon caustic is formed are determined.
About the authors
S. M. Bakharev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B. N. Yeltsin
Author for correspondence.
Email: bakharevsm@imp.uran.ru
Russian Federation, Yekaterinburg, 620108; Yekaterinburg, 620002
S. P. Savchenko
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: bakharevsm@imp.uran.ru
Russian Federation, Yekaterinburg, 620108
A. P. Tankeyev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: bakharevsm@imp.uran.ru
Russian Federation, Yekaterinburg, 620108
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