Probability of Resonant 23.8-keV γ-radiation from Sn119 and Anharmonicity of AtomiÓ Vibrations in Ferroelectrics of the Perovskite Type
Plotnikova M.V. , Mitrofanov K.P. , Venevtsev Yu.N.
Precision NGR measurements were made on the impurity Snlie nuclei in the ferroelectrics BaTi03 and òøôàÚ and in the antiferroelectric PbZr03. The character of the temperature dependence of the Mossbauer-effect probability has made it possible to conclude that low-temperature anharmon-icity is present in the lattice vibrations of BaTiOj and PbTi03 in the entire temperature range of existence of these crystals.