EFFECT OF COLUMNAR DEFECTS ON THE VORTEX DYNAMICS IN A TWINNED YBCO-123 CRYSTAL

Authors
COHEN LF ZHUKOV AA PERKINS GK TOTTY J CAPLIN AD KUPFER H WOLF TH WIRTH G
Citation
Lf. Cohen et al., EFFECT OF COLUMNAR DEFECTS ON THE VORTEX DYNAMICS IN A TWINNED YBCO-123 CRYSTAL, Physica. C, Superconductivity, 282, 1997, pp. 2227-2228
Citations number
7
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
282
Year of publication
1997
Part
4
Pages
2227 - 2228
Database
ISI
SICI code
0921-4534(1997)282:<2227:EOCDOT>2.0.ZU;2-5
Abstract
Vortex dynamics is investigated in a high quality twinned YBCO crystal irradiated to create columnar defects along the crystallographic c-ax is with a 0.5T matching field. The dynamic creep rate Q has been studi ed as a function of field up to 8T between 10K and 91K. Due to competi ng correlated disorder from the twins and columns and also underlying point defect pinning, the dynamic behaviour is complicated at low fiel ds. At fields above 2T, the dynamics resembles that of unirradiated tw inned YBCO crystals at all temperatures.