CRYSTAL-STRUCTURE, MAGNETISM, AND SUPERCONDUCTIVITY OF YBA2(CU1-XFEX)3O7+Y WITH X=0.05-0.15

被引：48

作者：

KATANO, S ^{[1
]}

MATSUMOTO, T ^{[1
]}

MATSUSHITA, A ^{[1
]}

HATANO, T ^{[1
]}

FUNAHASHI, S ^{[1
]}

机构：

[1] NATL RES INST MET,MEGURO KU,TOKYO 153,JAPAN

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.41.2009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron scattering experiments and magnetic-susceptibility measurements have been performed to investigate the structural and magnetic properties of YBa2(Cu1-xFex)3O7+y with x=0.05, 0.10 (superconductors), and 0.15 (nonsuperconductor). Rietveld refinements of neutron diffraction at room temperature indicate that the Fe atoms occupy both the Cu(1) chain and Cu(2) plane sites the occupation of the Cu(2) sites is about 30% of the total Fe content. Neutron-diffraction measurements down to 5.5 K indicate no evidence of long-range magnetic order; however, neutron small-angle scattering as a function of temperature shows a cusplike anomaly around 20 K. This suggests that the Fe-doped YBa2Cu3O7 system undergoes spin-glass ordering at low temperatures; accordingly, in the superconducting samples superconductivity and spin-glass coexist. Magnetic susceptibility for the nonsuperconducting sample gives further evidence for the spin-glass order. The results obtained are discussed in connection with the superconducting properties of this system. © 1990 The American Physical Society.

引用

页码：2009 / 2016

页数：8

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