Abstract
The low-frequency elastic properties of strontium titanate near the ferroelastic phase transition were studied by the torsional-vibration technique. Domain wall motion was shown to contribute noticeably to the anomalies in the shear modulus and internal friction. It was established that the wall motion under varying elastic stresses is an unactivated process corresponding to viscous flow with a relaxation time inversely proportional to temperature. Spontaneous twisting of samples at the phase transition was revealed, and a model is proposed to account for the sample chirality and the spontaneous twisting effect.
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Translated from Fizika Tverdogo Tela, Vol. 44, No. 6, 2002, pp. 1106–1115.
Original Russian Text Copyright © 2002 by Lemanov, Gridnev, Ukhin.
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Lemanov, V.V., Gridnev, S.A. & Ukhin, E.V. Low-frequency elastic properties, domain dynamics, and spontaneous twisting of SrTiO3 near the ferroelastic phase transition. Phys. Solid State 44, 1156–1165 (2002). https://doi.org/10.1134/1.1485046
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DOI: https://doi.org/10.1134/1.1485046