CERIUM-DOPING AND OXYGEN-REDUCTION EFFECTS ON MAGNONS AND PHONONS IN ND2-XCEXCUO4-Y

被引：21

作者：

SUGAI, S ^{[1
]}

HIDAKA, Y ^{[1
]}

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, APPL ELECTR LABS, IBARAKI 31911, JAPAN

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.44.809

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cerium-substitution and oxygen-reduction effects on magnons in Nd(2-x)Ce(x)CuO4-y were investigated by Raman scattering. Even with increasing Ce concentration, the local antiferromagnetic order does not decrease and, moreover, the average energy of the magnon peak increases, in contrast to hole-type superconductors. This quite different behavior between electron- and hole-type superconductors may suggest that the spins do not directly contribute to the superconductive mechanism. Only near x = 0.15 is there almost no oxygen deficiency on the CuO2 layers. It indicates that the defects on the layers disturb the superconductivity.

引用

页码：809 / 813

页数：5

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