OXYGEN NONSTOICHIOMETRY AND METAL SUBSTITUTION IN TISR2CACU2O7-Z

被引：32

作者：

IZUMI, F

KONDO, T

SHIMAKAWA, Y

MANAKO, T

KUBO, Y

IGARASHI, H

ASANO, H

机构：

[1] NEC CORP LTD,FUNDAMENTAL RES LABS,MIYAMAE KU,KAWASAKI 216,JAPAN

[2] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1991年 / 185卷 / pt 1期

关键词：

D O I：

10.1016/0921-4534(91)92110-W

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure parameters of superconducting and nonsuperconducting TlSr2CaCu2O7-z were refined using neutron-powder-diffraction data on the basis of P4/mmm space group. A 1d site of oxygen on a TlO sheet is considerably deficient even in the oxygen-rich nonsuperconducting sample; the occupation factor of this site was refined to be 0.88. It decreases to 0.80 in the superconducting sample with a T(c) of 58 K. That is, the change in oxygen content and the corresponding one in hole concentration are caused by incorporation and release of oxygen atoms on the TlO sheets. The present refinements also show that a Ca site is about 12% substituted by Tl.

引用

页码：615 / 616

页数：2

共 4 条

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ASANO, H
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