Condensed Phonon Modes in Successive Phases of WO_3
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概要
- 論文の詳細を見る
The irreducible representations of normal modes of W03 are presented at thepoints F, X, M and 7< in or on the Brillouin zone of the hypothetic cubic phase.The atomic displacements at each phase are decomposed into the normal modesreferring to the diffraction data. The normal modes concerned with W atomscondense at all the transition points except for the orthorhombic-monoclinictransition, where a linear combination of three rotational modes of W0.5 octa-hedra, wi.-r-7<H.+-A#f, condenses.Antiferrodistortive structures in the phases above room temperature arc dueto the condensations of the M, X and 71? modes. Ferridistortive structure in themonoclinic (II) phase is due to the condensation of both If, and M!,' modes.W03 is shown to have ferridistortive structures with first-order successive phasetransitions.
- 社団法人日本物理学会の論文
- 1979-03-15
著者
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Kawaminami Masaru
Department Of Physics College Of Liberal Arts Kagoshima University
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Hirose Toshikazu
Department Of Physics College Of Liberal Arts Kagoshima University
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