High-field ac susceptometer using Helmholtz coils as a magnetizer

被引：47

作者：

Chen, DX ^{[1
]}

机构：

[1] Univ Autonoma Barcelona, Dept Fis, ICREA, Barcelona 08193, Spain

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2004年 / 15卷 / 06期

关键词：

ac susceptometer; Helmholtz coils; inductance; superconducting disc; film and tape;

D O I：

10.1088/0957-0233/15/6/021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An ac susceptometer is designed for measuring ac susceptibility of disc, film or tape samples of high-temperature superconductors at 77 K in an applied field as high and uniform as possible. It is equipped with a pair of magnetizing Helmholtz coils and a pair of coaxial concentric measuring-compensating coils. For this, the field uniformity and impedance of the magnetizing Helmholtz coils with square coil cross-section and the flux linkage in the measuring-compensating coils produced by the sample moment are systematically and accurately computed based on the analytical formulae for the mutual inductance between two loops and the self-inductance of a thin solenoid. Problems related to the susceptometer calibration and the susceptibility measurements are discussed.

引用

页码：1195 / 1202

页数：8

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