NEW 1212 STRUCTURAL ANALOG OF YBA2CU3O7 - THE SR-BASED SUPERCONDUCTING COPPER-OXIDE CUSR2-XLAXYCU2O7+DELTA WITH T(C)SIMILAR-TO 60-K

被引：6

作者：

DABROWSKI, B ^{[1
]}

ZHANGMACCOY, V ^{[1
]}

HANNON, R ^{[1
]}

HUNTER, BA ^{[1
]}

JORGENSEN, JD ^{[1
]}

WAGNER, JL ^{[1
]}

HITTERMAN, RL ^{[1
]}

机构：

[1] ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1993年 / 208卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(93)90685-J

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have prepared a new superconducting copper oxide, CuSr1-xLaxYCu2O7+delta (x approximately 0.4, delta approximately 0.2) with T(c) approximately 60 K. While the parent compound, x=0, can be prepared only at very high oxygen pressures (P(O2) greater-than-or-equal-to 20 000 atm), the tetragonal (a=3.8027, c=11.3806 angstrom), La-doped, material can be obtained at relatively moderate pressures, P(O2)=600 atm at 1180-degrees-C. Rietveld refinements of neutron powder diffraction data show that La and Sr occupy the ''Ba'' site but with slightly different positions. The displacement pattem of neighboring oxygen atoms suggests that the La defects pair to form dimers perpendicular to the basal plane.

引用

页码：183 / 188

页数：6

共 14 条

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