Structures and Low Temperature Magnetic Anomalies of High Pressure RE2CuO4

被引：0
作者：
吴云龙
熊玉峰
李克强
姚玉书
机构：
[1] Graduate School of Chinese Academy of Sciences, Beijing 100039, China , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China ,Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China ,Institute of
[2] Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China
来源：
JournalofRareEarths | 2005年 / 02期
关键词：
magnetism; T′ phase cuprate; low temperature; high pressure; rare earths;
D O I：
暂无
中图分类号：
O521 [高压物理学];
学科分类号：
070205 ;
摘要：
A series of oxygen-doped RE2CuO4 （RE=Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm） was synthesized using high-pressure/oxygen-doped technique. The structures and low temperature magnetic properties were investigated. The XRD patterns indicate that the structures of high oxygen pressure RE2CuO4 （only for RE=Sm, Eu） samples are pure T′ phase, but when RE= Gd, Tb, Dy, Ho, Er, Tm, the structures turn to disorder. The magnetic anomalies that occurred at T30 K are observed in high oxygen pressure RE2CuO4. It is found that the transition temperatures of weak ferromagnetic anomalies are nearly independent of the rare-earth components. Thus, the O-doping plays an important role in anomalous magnetic properties of RE2CuO4+δ. The magnetic anomalies in RE2CuO4 are considered to be due to ferromagnetic clusters formed in the Cu-O plane after the oxygen doping.
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页码：199 / 202 +126
页数：5
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