Critical Dynamics of SrTi $O_{3}$ for $T >~ T_{c}$

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21 February 1972

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 28 (8) , 500-503
DOI:10.1103/physrevlett.28.500

Abstract

We propose a phenomenological theory for the rotations of the

B O_{6}

octahedra in

AB O_{3}

perovskites at structural transitions. The EPR linewidth behaves as

ε^{- ν (1 - 2 η)}

and the ultrasonic attenuation as

ω^{2} ε^{- ν (2 - η)}

close to

T_{c}

. Further away a crossover to different power laws is predicted. We find an anomaly in the sound velocity.

Keywords

This publication has 17 references indexed in Scilit:

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