LOCAL MAGNETIC MEASUREMENT OF STRONG PINNING BY COLUMNAR DEFECTS

Authors
KONCZYKOWSKI M ZELDOV E MAJER D BOUFFARD S
Citation
M. Konczykowski et al., LOCAL MAGNETIC MEASUREMENT OF STRONG PINNING BY COLUMNAR DEFECTS, Physica. C, Superconductivity, 282, 1997, pp. 2189-2190
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
4
Pages
2189 - 2190
Database
ISI
SICI code
0921-4534(1997)282:<2189:LMMOSP>2.0.ZU;2-O
Abstract
Local magnetic measurements by Hall-sensor arrays are used to study fl ux penetration and trapping in heavy ion irradiated YBCO:123 crystals. From the Bean-like flux profiles we obtain loops of the field gradien t dB(z)/dx vs local induction B-z, which show an asymmetry between the flux penetration and exit processes. The asymmetry is related to a su dden acceleration of the relaxation at some characteristic value of th e local induction during flux penetration only.