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Crossed-magnetic-field experiments on stacked second generation superconducting tapes: Reduction of the demagnetization effects

journal contribution
posted on 21.04.2016, 08:54 by M. Baghdadi, Harold Steven Ruiz, T. A. Coombs
The crossed-magnetic-field effect on the demagnetization factor of stacked second generation (2G) high temperature superconducting tapes is presented. The superconducting sample was initially magnetized along the c-axis by the field cooling magnetization method and after achieving the magnetic relaxation of the sample, an extensive set of experimental measurements for different amplitudes of an applied ac magnetic field parallel to the ab-plane was performed. On the one hand, a striking reduction of the demagnetization factor compared with the reported values for superconducting bulks is reported. On the other hand, the demagnetization factor increases linearly with the amplitude of the ac transverse magnetic field confirming the universal linear behavior for the magnetic susceptibility predicted by Brandt [Phys. Rev. B 54, 4246 (1996)]. The study has been also pursued at different frequencies of the ac transverse magnetic field in order to determine the influence of this parameter on the demagnetization factor measurements. We report an even lower demagnetization factor as long as the frequency of the transverse magnetic field increases. Thus, the significant reduction on the demagnetization factor that we have found by using stacked 2G-superconducting tapes, with higher mechanical strength compared with the one of superconducting bulks, makes to this configuration a highly attractive candidate for the future development of more efficient high-power density rotating machines and strong magnet applications.

History

Citation

Applied Physics Letters, 2014, 104, 232602

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

VoR (Version of Record)

Published in

Applied Physics Letters

Publisher

American Institute of Physics (AIP)

issn

0003-6951

eissn

1077-3118

Acceptance date

08/05/2014

Copyright date

2014

Available date

21/04/2016

Publisher version

http://scitation.aip.org/content/aip/journal/apl/104/23/10.1063/1.4879263

Language

en