An ac susceptometer for the characterization of large, bulk superconducting samples

被引：17

作者：

Laurent, P. ^{[1
]}

Fagnard, J. F. ^{[1
]}

Vanderheyden, B. ^{[1
]}

Babu, N. Hari ^{[2
]}

Cardwell, D. A. ^{[2
]}

Ausloos, M. ^{[3
]}

Vanderbemden, P. ^{[1
]}

机构：

[1] Univ Liege, SUPRATECS, Dept Elect Engn & Comp Sci, B-4000 Liege, Belgium

[2] Univ Cambridge, IRC Superconductiv, Cambridge CB2 IPZ, England

[3] Univ Liege, SUPRATECS, Dept Phys, B-4000 Liege, Belgium

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2008年 / 19卷 / 08期

关键词：

ac susceptometer; magnetic susceptibility; high temperature superconductors;

D O I：

10.1088/0957-0233/19/8/085705

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The main purpose of this work was to design, develop and construct a simple, low-cost ac susceptometer to measure large, bulk superconducting samples (up to 32 mm in diameter) in the temperature range 78-120 K. The design incorporates a double heating system that enables a high heating rate (25 K h(-1)) while maintaining a small temperature gradient (< 0.2 K) across the sample. The apparatus can be calibrated precisely using a copper coil connected in series with the primary coil. The system has been used successfully to measure the temperature dependence of the ac magnetic properties of entire RE-Ba-Cu-O [(RE) BCO] bulk superconducting domains. A typical ac susceptibility measurement run from 78 K to 95 K takes about 2 h, with excellent temperature resolution (temperature step similar to 4 mK) around the critical temperature, in particular.

引用

页数：10

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