mu SR on the novel heavy-fermion system Nd2-yCeyCuO4

被引：11

作者：

Hillberg, M ^{[1
]}

deMelo, MAC ^{[1
]}

Klaub, HH ^{[1
]}

Wagener, W ^{[1
]}

Litterst, FJ ^{[1
]}

Adelmann, P ^{[1
]}

Czjzek, G ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM KARLSRUHE,INST NUKL FESTKORPERPHYS,D-76128 KARLSRUHE,GERMANY

来源：

HYPERFINE INTERACTIONS | 1997年 / 104卷 / 1-4期

关键词：

D O I：

10.1023/A:1012692213409

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The magnetic correlations in Nd2-yCeyCuO4 have been studied by zero and longitudinal field mu SR. Nd1.8Ce0.2CuO4 reveals a saturation of the muon relaxation rate below 0.5 K. Even down to 70 mK LF spectra evidence spin fluctuations in the dynamic regime with a rate of similar to 10(9) s(-1) excluding long range magnetic order or spin glass freezing. The average Nd moment is estimated to be approximate to 0.2 mu(B), i.e., strongly reduced from the value determined for the ground state Kramers doublet of Nd2CuO4. Extending former mu SR measurements on Nd2CuO4, a gradual enhancement of the internal field has been detected below 10 K which is accompanied by an increase of the relaxation rate. These results are attributed to the development of ordered Nd moments.

引用

页码：221 / 226

页数：6

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