UNCONVENTIONAL FLUX DYNAMICS IN THE HEAVY-FERMION SUPERCONDUCTORS UPT3 AND UBE13

Authors
AMANN A VISANI P AUPKE K MOTA AC MAPLE MB DALICHAOUCH Y ARMSTRONG PE FISK Z MITIN AV
Citation
A. Amann et al., UNCONVENTIONAL FLUX DYNAMICS IN THE HEAVY-FERMION SUPERCONDUCTORS UPT3 AND UBE13, Physica. C, Superconductivity, 235, 1994, pp. 2443-2444
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
235
Year of publication
1994
Part
4
Pages
2443 - 2444
Database
ISI
SICI code
0921-4534(1994)235:<2443:UFDITH>2.0.ZU;2-5
Abstract
We have investigated flux creep in single crystals of UPt3 (H//c) and UBe13 (H//c(4)) in the temperature range 5 mK < T < T-c and for magnet ic fields H < 0.2 T. The relaxation curves for both of these heavy fer mion superconductors show novel behaviours, with decay laws which depe nd strongly on the applied field. At all temperatures, we observe cont ributions to the decays which seem to arise from different processes w ith different time dependences, namely logarithmic and stretched expon ential.