This article is cited in 3 papers

Phenomenological description of a giant temperature hysteresis of ultrasound velocity and internal friction in lanthanum manganite

A. P. Saiko, S. A. Markevich

Institute of Solid State Physics and Semiconductors NASB, Minsk

Abstract: We propose an explanation for the experimentally observed [1] giant temperature hysteresis of the ultrasound velocity and internal friction in single crystals of lanthanum manganite (La$_{0.8}$Sr$_{0.2}$MnO$_{3}$). The effect is interpreted within the framework of a phenomenological model based on the notion of two coexisting sublattices of the oxygen octahedra performing cooperative tilting-rotational oscillations in bistable potential fields.

PACS: 62.65.+k, 64.70.Kb

Received: 31.07.2003

 English version: Journal of Experimental and Theoretical Physics Letters, 2003, 78:5, 332–335

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