PHASE-TRANSITIONS AND SUPERCONDUCTIVITY OF SR-SUBSTITUTED LA2-XBAXCUO4(X=0.125)

被引：2

作者：

KATANO, S ^{[1
]}

UEDA, Y ^{[1
]}

HAYASHI, A ^{[1
]}

MORI, N ^{[1
]}

机构：

[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

来源：

PHYSICA B | 1995年 / 213卷

关键词：

D O I：

10.1016/0921-4526(95)00068-K

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron diffraction and magnetic susceptibility measurements have been performed to study the correlations between structural phase transitions and superconductivity in Sr-substituted La2-xBaxCuO4 with x = 0.125: La2-xBax-ySryCuO4 with y from 0 to 0.105. The crystal structure at low temperature changes drastically with Sr substitution; that is, the structure transforms from tetragonal P4(2)/ncm (LTT) to orthorhombic Peen, and then to orthorhombic Cmca (LTO) with increasing y. Corresponding to this stabilization of the LTO structure, the bulk superconducting transition temperature T-c is greatly enhanced. Crystal parameters and bond lengths obtained by profile analysis decrease monotonically as a function of y. A large reduction in the bond length of the Cu-apical O bond is noted for the increase in T-c.

引用

页码：81 / 83

页数：3

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