Spontaneous magnetic moments in YBa2Cu3O7-δ thin films

被引：26

作者：

Tafuri, F ^{[1
]}

Kirtley, JR

机构：

[1] Seconda Univ Napoli, Dipartimento Ingn Informaz, Aversa, CE, Italy

[2] Univ Naples Federico II, INFM, Dipartimento Sci Fis, Naples, Italy

[3] IBM Corp, Thomas J Watson Res Ctr, Yorktown Heights, NY 10598 USA

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.62.13934

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have observed spontaneous magnetic moments with random signs in c-axis-oriented thin films of the high-T-c cuprate superconductor YBa2Cu3O7-delta, imaged with a scanning superconducting quantum interference device microscope. These moments arise when the samples become superconducting, and appear to be associated with nonferromagnetic defects in the films. In contrast with granular high-T-c samples, which also show spontaneous moments with random signs, the present samples shield diamagnetically.

引用

页码：13934 / 13937

页数：4

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