Low Temperature Physics: 46, 824 (2020); https://doi.org/10.1063/10.0001549
Fizika Nizkikh Temperatur: Volume 46, Number 8 (August 2020), p. 976-983    ( to contents , go back )

Antiferromagnet as the tunable single-phase elastic hyperbolic medium with the spatial dispersion

S.V. Tarasenko and V.G. Shavrov

Kotel'nikov Institute of Radio Engineering and Electronics of RAS, Moscow 125009, Russia
E-mail: s.v.tarasenko23@gmail.com
pos Анотація:

Received March 25, 2020, published online June 22, 2020

Abstract

For a plane and quasi-plane SH-type volume wave incident from the outside onto a system of equidistant antiferromagnetic dielectric layers, taking into account spatial dispersion in an antiferromagnet as a hyperbolic magnetoacoustic medium induc-es a number of resonant refractive anomalies including the effects of total reflection (propagation) and formation against the back-ground continuous spectrum of discrete localized magnon-phonon states, amplification of the angular Schoch effect and in the case of a one-dimensional resonant magnetic phonon crystal — to the effect of superradiance.

Key words: magnetoacoustics, magnetoacoustic wave, resonant magnetic phonon crystal.

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