volume 106, issue 2, P723-730 1981
DOI: 10.1002/pssb.2221060239
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Abstract: An expression for the spectrum of critical inelastic scattering of Mossbauer radiation is derived a t the structural phase transition. It is assumed that the central peak (which determines such characteristics of scattered radiation as the intensity and the width) is due to slow motions of point defects. The temperature dependence of the effective line width is found to arise from vacancy diffusion in BaTiO, to the right of the transition temperature. Qualitative agreement with corresponding experimental data…

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