Direct observation of incommensurate modulation in phase-separated Cu-rich La2CuO4.003

被引：31
|
作者：
Dong, XL [1 ]
Dong, ZF
Zhao, BR
Zhao, ZX
Duan, XF
Peng, LM
Huang, WW
Xu, B
Zhang, YZ
Guo, SQ
Zhao, LH
Li, L
机构：
[1] Chinese Acad Sci, Natl Lab Superconduct, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
[4] Chinese Acad Sci, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.80.2701
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An incommensurate modulation was observed directly for the first time by transmission electron microscopy in a phase-separated Cu-rich La2CuO4.003 crystal at room temperature and at 93 K. After annealing in Ar atmosphere, both incommensurate modulation and phase separation disappeared. It is concluded that the incommensurate modulation is attributed to the phase separation, while the occurrence of phase separation in the sample with such a low excess oxygen content results from the enhanced antiferromagnetic interaction due to the Cu dopant.
引用
收藏
页码：2701 / 2704
页数：4
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