Quantum tunneling effects in YBa2Cu3Ox superthin films

Citation
Cg. Li et al., Quantum tunneling effects in YBa2Cu3Ox superthin films, PHYSICA B, 284, 2000, pp. 577-578
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
0921-4526 → ACNP
Volume
284
Year of publication
2000
Part
1
Pages
577 - 578
Database
ISI
SICI code
0921-4526(200007)284:<577:QTEIYS>2.0.ZU;2-S
Abstract
Magnetic relaxation and V-I characteristics in 60 Angstrom thick YBCO super -thin films have been measured. The normalized relaxation rates and the slo pes of Ig(V)-I curves in an applied field up to 6 T become independent of t emperature below 16 IC. This fact indicates that the temperature T-er at wh ich the Vortex dynamics changes from thermal activation to quantum tunnelin g can be much higher than those reported previously. Analysis of experiment al results suggests that the high pinning energy in YBCO super-thin films i s an important factor that contributes to a high T-er. (C) 2000 Elsevier Sc ience B.V. All rights reserved.