Mechanisms of the ferroelectric and structural phase transitions. structural distortions in perovskites
Mechanisms of the ferroelectric and structural phase transitions. structural distortions in perovskites
复制标题
铁电和结构相变的机制。
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
K. S. Aleksandrov
中科院分区：
文献类型：
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作者：
K. S. Aleksandrov
钙钛矿类晶体中可能的扭曲的对称性方面进行了讨论。四个软模在不同条件下的压缩导致了畸变。独立的扭曲（倾斜和极位移）的叠加被认为是和相位的对称性。分析了ABX_3晶体的相变序列。
The symmetry aspects of probable distortions in perovskite-like crystals are discussed. Four soft modes of the lattice which are condensed at different conditions lead to the distortions. The superpositions of the independent distortions (tilts and polar displacements) are considered and the symmetry of the phases is derived. The sequences of phase transitions in the ABX3-crystals are analysed.