INHOMOGENEOUS SUPERCONDUCTING PROPERTIES OF LA2-XSRXCUOY EXCEPT FOR X-APPROXIMATELY-0.16, Y-APPROXIMATELY-4.0

被引：34

作者：

YOSHIMURA, K

NISHIZAWA, Y

UEDA, Y

KOSUGE, K

机构：

[1] Department of Chemistry, Faculty of Science, Kyoto University, Kyoto 606, Sakyo-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 09期

关键词：

ac susceptibility; high Tc superconductivity; LSCO; Meissner effect; oxygen contents; Sr composition dependence;

D O I：

10.1143/JPSJ.59.3073

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ac susceptibility was measured for the powdered samples of La2-xSrxCuOy with various Sr and oxygen contents. Only the sample with a composition of x~0.16 and y~4.0 shows a sharp superconducting transition at 38 K having the maximum value of the Meissner volume fraction f of more than 80% of the ideal value. The samples with the other concentrations have broad transitions at lower transition tem-peratures with smaller/, while the onset temperature of the Meissner effect was ob-served to be independent of x and y, and close to 38 K, suggesting that only the com-pound with x~0.16 and y~4.0 shows intrinsic superconductivity in this system. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

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页码：3073 / 3076

页数：4

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