TITLE

Effect of ac susceptibility in superconductors on magnetic shielding

AUTHOR(S)
Maruyama, M.; Hidaka, M.; Satoh, T.
PUB. DATE
April 2003
SOURCE
Applied Physics Letters;4/28/2003, Vol. 82 Issue 17, p2868
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have theoretically studied the effect of ac susceptibility in superconductors on magnetic shielding. Our recent study of measured wave form distortion observed in a high-T[SUBc] superconductor sampler system suggests that the magnetic field leaks into the sampler circuit through the Yba[SUB2]Cu[SUB3]O[SUB7-x] ground plane when an ac magnetic field is applied. The occurrence of such magnetic leakage can be explained by complex susceptibility in the ground plane because a shielding magnetic field with a phase shifted due to an imaginary part of the susceptibility cannot cancel an applied ac magnetic field completely. A simple calculation shows that the residual magnetic field should have an advanced phase of 45°-90°, which coincides with the results obtained in the sampler system.
ACCESSION #
9555488

 

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