Publication
Physical Review Letters
Paper

Consideration of a frequency-independent damping coefficient from Raman measurements

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Abstract

The possibility of a frequency-independent or frequency-dependent damping constant is experimentally investigated, using the right-angle Raman results for the heavily damped soft-E mode in the ferroelectric PbTiO3 at 491°C (just below the transition temperature). The fits, over a wide frequency range, using a frequency-independent are so good that there is little room for any appreciable frequency dependence. This is in disagreement with several claims made in a recent paper by Heiman, Ushioda, and Remeika. © 1976 The American Physical Society.

Date

26 Jul 1976

Publication

Physical Review Letters

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