SURFACE PINNING AND INFLUENCE OF FIELD REDUCTION ON MAGNETIC-RELAXATION IN YBA2CU3O7 BULK SAMPLE

Authors
ZENG ZY YU Y SUN AM XU XN DING SY YAO XX REN HT LING XA
Citation
Zy. Zeng et al., SURFACE PINNING AND INFLUENCE OF FIELD REDUCTION ON MAGNETIC-RELAXATION IN YBA2CU3O7 BULK SAMPLE, Physica. C, Superconductivity, 269(3-4), 1996, pp. 297-300
Citations number
10
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
269
Issue
3-4
Year of publication
1996
Pages
297 - 300
Database
ISI
SICI code
0921-4534(1996)269:3-4<297:SPAIOF>2.0.ZU;2-0
Abstract
Differences between the magnetic relaxation due to surface barriers an d bulk pinning is studied. It is shown that a small field reduction ca n affect the two relaxation processes quite differently. Experimental results on a melt-grown YBa2Cu3O7 bulk sample and theoretical calculat ions based on surface pinning support this conclusion. We suggest that field-reduction relaxation experiments can be used to probe surface p inning.