New aspect of low-temperature phase transitions of La-cuprates

被引：4
|
作者：
Horibe, Y
Inoue, Y
Koyama, Y
机构：
[1] NISSAN ARC LTD,RES DEPT,STRUCT ANAL SECT,YOKOSUKA,KANAGAWA 237,JAPAN
[2] WASEDA UNIV,KAGAMI MEM LAB MAT SCI & TECHNOL,SHINJUKU KU,TOKYO 169,JAPAN
[3] WASEDA UNIV,ADV RES CTR SCI & ENGN,SHINJUKU KU,TOKYO 169,JAPAN
来源：
JOURNAL OF SUPERCONDUCTIVITY | 1997年 / 10卷 / 04期
关键词：
La-cuprates; phase transition; transmission electron microscopy;
D O I：
10.1007/BF02765739
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The change in the microstructure on aging at 12 K below a low-temperature structural phase transition in La1.5Sr0.1Nd0.4CuO4 has been examined by transmission electron microscopy. From a series of 100 forbidden dark field images obtained in in situ observation, spotty-shape regions with a Pccn/LTT tilt of the CuO6 octahedron were found to be nucleated and grow inside a LTO domain, accompanying the annihilation of some spotty-shape regions. In addition, there exists a tweed texture in fundamental dark field images, which is due to the macroscopic strain involved in the transition. Because a map of the tweed texture is different from that of :he spotty-shape region, the tilt of the octahedron is not always coupled to a proper spontaneous strain.
引用
收藏
页码：461 / 466
页数：6
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