EXPERIMENTAL-EVIDENCE OF QUANTUM TUNNELING OF 2D VORTICES UP TO 10-K IN BULK TL2BA2CA2CU3O10 SUPERCONDUCTOR

Authors
ZHANG XX GARCIA A TEJADA J XIN Y WONG KW
Citation
Xx. Zhang et al., EXPERIMENTAL-EVIDENCE OF QUANTUM TUNNELING OF 2D VORTICES UP TO 10-K IN BULK TL2BA2CA2CU3O10 SUPERCONDUCTOR, Physica. C, Superconductivity, 232(1-2), 1994, pp. 99-103
Citations number
26
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
232
Issue
1-2
Year of publication
1994
Pages
99 - 103
Database
ISI
SICI code
0921-4534(1994)232:1-2<99:EOQTO2>2.0.ZU;2-W
Abstract
Low-temperature magnetic relaxation measurements have been performed i n a sintered Tl2Ba2Ca2Cu3O10 bulk high-T(c) superconductor, with an ap plied magnetic field of 50 Oe. A temperature-independent normalized ma gnetic relaxation rate below 10 K is observed. The transition from the thermally activated vortex motion regime to the quantum tunneling reg ime is found to be very sharp, indicating the absence of dissipation i n this magnetic field. The observed behaviour is explained in terms of single 2D vortex motion in the Cu-O layers.