NEUTRON POWDER DIFFRACTION STUDY OF PHASE-SEPARATION IN LA2CUO4+DELTA OXIDIZED IN KMNO4 SOLUTIONS

被引：13
|
作者：
IZUMI, F
KIM, YI
TAKAYAMAMUROMACHI, E
KAMIYAMA, T
机构：
[1] TAEDOK SCI TOWN,KOREA RES INST STANDARDS & SCI,TAEJON 305606,SOUTH KOREA
[2] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN
来源：
PHYSICA C | 1994年 / 235卷
关键词：
D O I：
10.1016/0921-4534(94)91645-4
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Three samples of superconducting La2CuO4+delta with delta values of 0.047, 0.073, and 0.132 were prepared by oxidizing La2CuO4 in aqueous solutions of KMnO4 at 50 degrees C. The samples with delta = 0.073 and 0.132 respectively contained 3 and 2 phases with different delta and T-c values as a result of phase separation on exposure to air at room temperature. The crystal structures of the La2CuO4+delta phases in the three samples were studied by time-of-flight neutron powder diffraction. We could successfully determine the lattice and structure parameters of the constituent phases as well as their mass fractions.
引用
收藏
页码：841 / 842
页数：2
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