Effect of structural symmetry on the magnetic and superconducting properties in La1.875Ba0.125-xSrxCuO4

被引：4

作者：

Goka, H ^{[1
]}

Fujita, M ^{[1
]}

Ikeda, Y ^{[1
]}

Yamada, K ^{[1
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

来源：

PHYSICA C | 2001年 / 357卷 / SUPPL. 2期

关键词：

LBSCO; 1/8; problem; single crystal; magnetic susceptibility; LTO-LTT/Pccn transition;

D O I：

10.1016/S0921-4534(01)00223-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate interplay among magnetism.. superconductivity and crystal structure of 1/8-doped La-1.875 Ba0.125-x-Sr3CuO4 using single crystals. A step-like change in the superconducting transition temperature T-c takes place at a specific Sr concentration around x = 0.08. In the lower concentration region (x less than or equal to 0.075), T-c, is remarkably suppressed to around 10 K and weakly depends on x. Furthermore, a structural phase transition from low temperature orthorhombic (LTO) to low temperature tetragonal or Pccn phase occurs. At the transition an anomalous upturn of magnetic susceptibility is observed upon cooling under a magnetic field perpendicular to CuO2 plane. On the other hand, in the LTO phase with higher Sr concentration (x greater than or equal to 0.085), T-c is nearly constant around 30 K. (C) 2001 Published by Elsevier Science B.V.

引用

页码：256 / 259

页数：4

共 9 条

[1] STRUCTURAL PHASE-TRANSFORMATIONS AND SUPERCONDUCTIVITY IN LA2-XBAXCUO4 [J].