SrZrO_3の700から850℃における構造相転移のラマン分光による研究

概要

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The Pnma-Imma-I4/mcm phase transitions of SrZrO_3 have been successfully observed by measuring the variation of energies of phonon modes as a function of temperature. The squares of phonon mode frequencies, ω^2_0, exhibit a linear relation with temperature, T, on both sides of the phase transitions. An unusual value of -7 of the ratio of ∂̸(ω^2_0)/∂̸T below and above the phase transition temperature between Pnma and Imma, was observed compared to the value of -2 expected from the mean field theory. The result can be accounted for in terms of coupling between an optical mode and strain.
社団法人日本セラミックス協会の論文
2004-04-01