TORQUE STUDY OF LAYERED SUPERCONDUCTING OXIDE BI2SR2CACU2O8+DELTA SINGLE-CRYSTAL

被引：39

作者：

OKUDA, K ^{[1
]}

KAWAMATA, S ^{[1
]}

NOGUCHI, S ^{[1
]}

ITOH, N ^{[1
]}

KADOWAKI, K ^{[1
]}

机构：

[1] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1991年 / 60卷 / 10期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTING OXIDE; MAGNETIC ANISOTROPY; TORQUE MEASUREMENTS; FLUX PINNING EFFECT; BI-SR-CA-CU-O SINGLE CRYSTAL; LOWER CRITICAL FIELD;

D O I：

10.1143/JPSJ.60.3226

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic anisotropy of layered superconducting oxide Bi2Sr2CaCu2O8 + delta single crystal was investigated by torque measurements at 77 K. A hysteresis loop with a sharp cusp was found for the magnetic fields below about 6 kOe close to the ab-plane. It can be satisfactorily explained by assuming that the component of diamagnetic moment perpendicular to the ab-plane is induced by the applied external field. In fact, the field and angular dependence of the cusp is ruled well by the relation H cos theta = Hc(p), where Hc(p) is the critical field perpendicular to the ab-plane at which the flux-pinning decreases abruptly with increasing field.

引用

页码：3226 / 3229

页数：4

共 10 条

[1] EXPERIMENTAL-EVIDENCE OF A DIMENSIONAL CROSSOVER IN Y1BA2CU3O7-SIGMA [J].