Surface influence on flux penetration into HTS bulks

The influence of surface treatment on AC loss in melt-processed quasi-single crystal HTS was investigated with resonance oscillations technique. We have found that amplitude dependencies of AC loss on magnetic field amplitude become rather complicated after surface polishing. The experimental data s...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2000-07, Vol.284, p.903-904
Main Authors: Kordyuk, A.A, Krabbes, G, Nemoshkalenko, V.V, Viznichenko, R.V
Format: Article
Language:English
Subjects:
AC losses
Melt processed HTS
Resonance oscillation technique
Surface barrier
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of surface treatment on AC loss in melt-processed quasi-single crystal HTS was investigated with resonance oscillations technique. We have found that amplitude dependencies of AC loss on magnetic field amplitude become rather complicated after surface polishing. The experimental data show well-distinguished dynamic crossover from absence of barrier at low rates of field variation to its appearence at higher rates. An explanation of such a dynamic surface barrier appearance based on consideration of along surface vortex propagation was suggested.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)02219-X