ENHANCED FLUX-PINNING AND FISHTAIL EFFECT IN SPIRAL GROWN BI2SR2CACU2OY SINGLE-CRYSTALS

Authors
WANG XL HORVAT J LIU HK DOU SX
Citation
Xl. Wang et al., ENHANCED FLUX-PINNING AND FISHTAIL EFFECT IN SPIRAL GROWN BI2SR2CACU2OY SINGLE-CRYSTALS, Physica. C, Superconductivity, 282, 1997, pp. 2125-2126
Citations number
6
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
4
Pages
2125 - 2126
Database
ISI
SICI code
0921-4534(1997)282:<2125:EFAFEI>2.0.ZU;2-0
Abstract
Magnetic hysteresis loops (M-H) were measured on spiral grown Bi2Sr2Ca Cu2Oy (Bi-2212) crystals. Enhanced flux pinning and an anomalous peak at magnetic field of 1000 - 2000 Oe were observed between 20 and 40 K for the spiral grown crystals. The anomalous peaks were observed both in high T-c (86 K) or in lower T-c (76 K) crystals. The surface pinnin g associted with the surface spirals other than screw dislocations and oxygen vacancies are probably responsible for the enhanced flux pinni ng and the anomalous magntization peak effect.