Geometrical and distributed surface barriers in Bi2Sr2CaCu2O8

被引：50

作者：

Morozov, N

Zeldov, E

Konczykowski, M

Doyle, RA

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

[2] Ecole Polytech, Solides Irradies Lab, CNRS, URA 1380, F-91128 Palaiseau, France

[3] Univ Cambridge, Interdisciplinary Res Ctr Superconduct, Cambridge CB3 0HE, England

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1997年 / 291卷 / 1-2期

关键词：

vortex dynamics; surface barrier; geometry effect; magnetic susceptibility;

D O I：

10.1016/S0921-4534(97)01666-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The local ac magnetic response in Bi2Sr2CaCu2O8 crystals of platelet and prism shapes has been measured using microscopic arrays of Hall sensors. At elevated temperatures the ac response in platelet samples is governed by the geometrical barrier whereas a distributed Bean-Livingston surface barrier is dominant for the prism-shaped sample. In the local measurements these two barriers display qualitatively different behavior and can be individually studied. Models for the local ac response are derived for the two cases and good agreement with experiment is obtained. (C) 1997 Elsevier Science B.V.

引用

页码：113 / 131

页数：19

共 53 条

[1] SURFACE BARRIER IN TYPE-2 SUPERCONDUCTORS [J].