EXPERIMENTAL-OBSERVATION OF QUANTUM CREEP IN HIGH-TC SUPERCONDUCTING YBCO-PRBCO SUPERLATTICES

Authors
VANDALEN AJJ GRIESSEN R SCHNACK HG TRISCONE JM FISCHER O
Citation
Ajj. Vandalen et al., EXPERIMENTAL-OBSERVATION OF QUANTUM CREEP IN HIGH-TC SUPERCONDUCTING YBCO-PRBCO SUPERLATTICES, Journal of alloys and compounds, 195(1-2), 1993, pp. 447-450
Citations number
18
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
195
Issue
1-2
Year of publication
1993
Pages
447 - 450
Database
ISI
SICI code
0925-8388(1993)195:1-2<447:EOQCIH>2.0.ZU;2-G
Abstract
Measurements of the dynamical relaxation rate of the magnetic moment o f YBCO/PrBCO multilayers with decoupled YBCO layers of 1.2, 2.4, 3.6, 4.8 and 9.6 nm thickness have been carried out with a high sensitivity capacitance torque magnetometer. The relaxation at low temperature in creases with decreasing YBCO layer thickness and reaches approximately 7% at 2 T in the thinnest sample. Deviations from thermally activated flux motion, due to thermally assisted vortex tunneling are observed at temperatures up to 8 K.