Current profiles and ac losses of a superconducting strip with an elliptic cross-section in a perpendicular magnetic field

被引：33

作者：

Gömöry, F. ^{[1
]}

Tebano, R. ^{[2
]}

Sanchez, A. ^{[3
]}

Pardo, E. ^{[3
]}

Navau, C. ^{[3
,4
]}

Husek, I. ^{[1
]}

Strycek, F. ^{[1
]}

Kovac, P. ^{[1
]}

机构：

[1] Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská 9, 842 39 Bratislava, Slovakia

[2] Dipartimento di Scienza dei Materiali, Istituto Nazionale Per la Fisica Della Materia, Università degli Studi di Milano-Bicocca, Via Cozzi 53, 20125 Milano, Italy

[3] Grup d'Electromagnetisme, Departament de Física, 08193 Bellaterra (Barcelona), Spain

[4] Escola Universitaria Salesiana de Sarria, Pg. Sant Joan Bosco 74, 08017 Barcelona, Catalonia, Spain

来源：

Superconductor Science and Technology | 2002年 / 15卷 / 09期

关键词：

Approximation theory - Aspect ratio - Magnetic field effects - Magnetic moments - Magnetic shielding - Magnetic susceptibility - Magnetization;

D O I：

10.1088/0953-2048/15/9/306

中图分类号：

学科分类号：

摘要：

We study the case of a hard type II superconductor in the form of a strip with an elliptic cross-section when it is placed in a transverse magnetic field. We approach the problem in two steps, both based on the critical-state model. First, we calculate numerically the penetrated current profiles that ensure complete shielding in the interior, without assuming an a priori form for the profiles. In the second step we introduce an analytical approximation that asumes that the current profiles are ellipses. Expressions linking the sample magnetization to the applied field are derived covering the whole range of applied fields. The theoretical predictions are tested by comparison with the experimental data for the imaginary part of ac susceptibility.

引用

页码：1311 / 1315