UPPER CRITICAL-FIELD OF A SM1.85CE0.15CUO4-Y SINGLE-CRYSTAL - INTERACTION BETWEEN SUPERCONDUCTIVITY AND ANTIFERROMAGNETIC ORDER IN COPPER OXIDES

被引：117

作者：

DALICHAOUCH, Y ^{[1
]}

LEE, BW ^{[1
]}

SEAMAN, CL ^{[1
]}

MARKERT, JT ^{[1
]}

MAPLE, MB ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,INST PURE & APPL PHYS SCI,LA JOLLA,CA 92093

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.64.599

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature dependence of the anisotropic upper critical magnetic field, Hc2(T), has been determined resistively in antiferromagnetic Sm1.85Ce0.15CuO4-y single crystals. We observe the first evidence in high-Tc copper oxides for the interaction between superconductivity and antiferromagnetic ordering of rare-earth ions; estimates of the exchange coupling J0.1 eV and the Ginzburg-Landau coherence lengths ab=79 AI and c=14.7 AI are obtained. In both Nd1.84Ce0.16CuO4-y and Sm1.85Ce0.15CuO4-y, the Hc2 data above TN can be described by Hc2(T)/Hc2+(0)=(1-T/Tc)1.6. © 1990 The American Physical Society.

引用

页码：599 / 602

页数：4

共 22 条

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