Abstract
The specific features of magnetoacoustic waves propagating in an orthorhombic antiferromagnet with weak ferromagnetism, namely, the Fe3BO6 orthoborate, are investigated experimentally in the vicinity of the spontaneous, first-order orientational phase transition. It is revealed that, at the phase transition point, the amplitude of active acoustic waves interacting with spin waves increases significantly. A phenomenological theory of magnetoelastic waves in orthoferrites is proposed. This theory allows for an intermediate domain structure existing in the range of a first-order orientational phase transition and offers a satisfactory explanation of the experimentally observed anomaly in the amplitude of active acoustic waves.
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Translated from Fizika Tverdogo Tela, Vol. 47, No. 10, 2005, pp. 1813–1817.
Original Russian Text Copyright © 2005 by Buchel’nikov, Dan’shin, Dolgushin, Izotov, Shavrov, Tsymbal, Takagi.
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Buchel’nikov, V.D., Dan’shin, N.K., Dolgushin, D.M. et al. Specific features of magnetoacoustic waves in Fe3BO6 . Phys. Solid State 47, 1886–1891 (2005). https://doi.org/10.1134/1.2087742
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DOI: https://doi.org/10.1134/1.2087742