GEOMETRICAL BARRIERS IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：597

作者：

ZELDOV, E

LARKIN, AI

GESHKENBEIN, VB

KONCZYKOWSKI, M

MAJER, D

KHAYKOVICH, B

VINOKUR, VM

SHTRIKMAN, H

机构：

[1] LD LANDAU THEORET PHYS INST, MOSCOW 117940, RUSSIA

[2] ECOLE POLYTECH, SOLIDES IRRADIES LAB, F-91128 PALAISEAU, FRANCE

[3] ARGONNE NATL LAB, ARGONNE, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.73.1428

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A theoretical description of vortex dynamics in thin flat samples is derived and is found to compare favorably with experimental results. In perpendicular applied magnetic field the vortex penetration is delayed significantly due to the presence of a potential barrier of geometrical origin. This novel geometrical barrier effect results in hysteretic magnetization and in the existence of an irreversibility line in the absence of bulk pinning. Among the unique characteristics of the barrier are a vortex concentration in the center of the sample and a zero-field peak in the magnetization loops.

引用

页码：1428 / 1431

页数：4