MANIPULATION OF BA-O LAYERS INDUCING ORTHORHOMBIC TETRAGONAL PHASE-TRANSITION IN YBA2-XSRXCU3O6.7

被引：25

作者：

GANGULI, AK

SUBRAMANIAN, MA

机构：

[1] Central Research and Development E. I. Dupont de Nemours and Co., Wilmington, DE 19880-0262

来源：

MATERIALS RESEARCH BULLETIN | 1991年 / 26卷 / 09期

关键词：

SUPERCONDUCTORS; YTTRIUM; BARIUM; STRONTIUM; COPPER;

D O I：

10.1016/0025-5408(91)90166-J

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Monophasic oxides of the type YBa2-xSrxCu3O6.7 (0.0 < x < 0.8) and YBa2-xSrxCu3O7.0 (0.0 < x < 0.8) have been synthesized. X-ray diffraction studies reveal an orthorhombic to tetragonal phase transition at x = 0.4 in the O6.7 series, the oxides are superconducting; T(c)'s from 52 (x = 0.0) to 37 K (x = 0.8). The O7.0 oxides are all orthorhombic with T(c)'s from 93 (x = 0.0) to 81 K (x = 0.8). Factors leading to the phase transition are discussed.

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页码：869 / 877

页数：9

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