Raman Scattering Study of SrTi18O3
Raman Scattering Study of SrTi18O3
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SrTi18O3 的拉曼散射研究
DOI：
10.1143/jpsj.70.648
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发表时间：
2001
影响因子：
1.7
通讯作者：
Y. Yagi
中科院分区：
文献类型：
--
作者：
M. Kasahara;H. Hasebe;Ruiping Wang;M. Itoh;Y. Yagi
用拉曼散射观察到x=0.87的单晶同位素铁电SrTi 18 O 3 x 16 O 3(1- x)的反铁畸变和铁电软模式。一种反铁畸变模式的频率在同位素效应引起的 24 K (T c ) 铁电转变点附近表现出逐渐变化。在两个相中也观察到了铁电微观区域的光谱形式特征。即使仅在 T c 下，铁电软模式也不表现出任何软化行为。讨论了同位素诱导铁电相的转变机制。
Antiferrodistortive and ferroelectric soft modes of isotoped ferroelectric SrTi 18 O 3 x 16 O 3(1- x ) were observed for a single crystal of x =0.87 with Raman scattering. The frequency of one of the antiferrodistortive modes exhibits a gradual change near the ferroelectric transition point at 24 K ( T c ) induced as the isotope effect. The spectral forms characteristic of the ferroelectric microscopic regions were also observed in both phases. The ferroelectric soft mode does not exhibit any softening behavior even just at T c . The transition mechanism of the isotopically induced ferroelectric phase is discussed.