Dynamics of dilute vortices in various high-T-C thin films
2002 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 91, no 10, 7137-7139 p.Article in journal (Refereed) Published
We study the dynamics of dilute vortices in c-axis oriented Y-123, Hg-, and Tl-1212 thin films, as well as a-axis oriented Hg-1212 thin films. Results on the Hg- and Tl-1212 thin films indicate that dislocation-mediated plastic flux creep of single vortices dominates at low temperatures and fields. As the temperature (or the field) is increased, increasing vortex-vortex interactions promote a collective behavior, characterized by elastic creep with a nonzero mu exponent. In some samples, effects of thermally assisted quantum creep are visible up to 45 K. In Y-123 thin films, creep is collective down to the lowest temperatures and fields investigated, while quantum creep persists up to 10-11 K.
Place, publisher, year, edition, pages
2002. Vol. 91, no 10, 7137-7139 p.
high-temperature superconductors, flux-creep, vortex matter, magnetic-relaxation, ii superconductors, single-crystals, current-density, field, bi2sr2cacu2o8+delta, transition
IdentifiersURN: urn:nbn:se:kth:diva-21545ISI: 000175575100110OAI: oai:DiVA.org:kth-21545DiVA: diva2:340243
QC 201005252010-08-102010-08-10Bibliographically approved