Magnetic imaging of the paramagnetic Meissner effect in the granular high-Tc superconductor Bi2Sr2CaCu2Ox

被引：28

作者：

Kirtley, JR ^{[1
]}

Mota, AC

Sigrist, M

Rice, TM

机构：

[1] IBM Res Corp, Yorktown Heights, NY 10598 USA

[2] ETH Honggerberg, CH-8093 Zurich, Switzerland

[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 60601, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1998年 / 10卷 / 06期

关键词：

D O I：

10.1088/0953-8984/10/6/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have imaged the spatial distribution of magnetic flux on a granular sample of the high-temperature superconductor Bi2Sr2CaCu2Ox using a scanning SQUID microscope. Our results establish the presence of spontaneous orbital magnetic moments which were suggested to be the origin of the paramagnetic response of these materials. The signature of the orbital magnetic moments is a rather broad distribution of local magnetic fields at the surface of the sample. A simple model for the distribution is presented.

引用

页码：L97 / L103

页数：7

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