Anomalous Pr ordering and structural analysis for oxygenated tetragonal 1212 compound Pr1.5Ba1.5Cu3O7.2

被引：4
|
作者：
Ku, HC [1 ]
Luo, HM
Chi, YP
Lin, BN
Hsu, YY
Lee, TJ
Shi, JB
Kao, HCI
机构：
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan
[2] Feng Chia Univ, Dept Elect Engn, Taichung 407, Taiwan
[3] Tamkang Univ, Dept Chem, Tamsui 251, Taiwan
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 1999年 / 117卷 / 3-4期
关键词：
D O I：
10.1023/A:1022546723142
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetic measurement and powder X-ray Rietveld analysis are performed oxygenated Pr1.5Ba1.5Cu3O7.2 cuprate. This tetragonal compound with lattice parameters a = 0.38916 nm and c = 1.16177 nm is found to form the TlBa2CaCu2O7 1212-type structure when written as Cu[Ba1.5Pr0.5]PrCu2O7.2. Low temperature magnetic data indicate that anomalous Pr order temperature T-N(Pr) decreases from 18 K for orthorhombic PrBa2Cu3O6.9 to 10.5 K for Pr1.5Ba1.5Cu3O7.2. The increasing Pr-O bond length with decreasing TN indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2p(pi) orbital in the CuO2 bi-layers.
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页码：885 / 889
页数：5
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