Universal superconducting and magnetic properties of the (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3Oy system:: a μSR investigation

被引：21

作者：

Keren, A ^{[1
]}

Kanigel, A

Lord, JS

Amato, A

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 126卷 / 1-2期

关键词：

superconductivity; magnetism; spin-glass; Uemura-plot; muon spin resonance;

D O I：

10.1016/S0038-1098(02)00670-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The (CaxLa1-x)(Ba1.75-xLa0.25+x) Cu3Oy, system is ideal for testing theories of high temperature superconductivity, since nearly the full range of doping is controlled by y, and T-c(max) is continuously controlled by x, with minimal structural changes. We investigate this system with both transverse and longitudinal field muSR. This allows us to re-examine the Uemura relation, the nature of the spontaneous magnetic fields below T-c, and the relation between their appearance temperature T-g and T-c(max). Our major findings are: (1) the Uemura relation is respected by this system more adequately than by other cuprates, (2) T-g and T-c are controlled by the same energy scale, (3) the phase separation between hole poor and hole rich regions is a microscopic one, and (4) spontaneous magnetic fields appear gradually with no moment size evolution. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：39 / 46

页数：8

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