Plastic Vortex Creep inYBa2Cu3O7−xCrystals

Autor:	V. M. Vinokur, Avner Shaulov, Y. Yeshurun, Y. Wolfus, Y. Abulafia, Ruslan Prozorov, Eli Zeldov, Vadim B. Geshkenbein, H. Wühl, D. Majer, L. Burlachkov
Rok vydání:	1996
Předmět:	Dislocation creep Magnetization Materials science Condensed matter physics Creep Computer Science::Information Retrieval Condensed Matter::Superconductivity Lattice (order) General Physics and Astronomy Activation energy Vorticity Magnetic flux Vortex
Zdroj:	Physical Review Letters. 77:1596-1599
ISSN:	1079-7114 0031-9007
Popis:	Local magnetic relaxation measurements in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} crystals show evidence for plastic vortex creep associated with the motion of dislocations in the vortex lattice. This creep mechanism governs the vortex dynamics in a wide range of temperatures and fields below the melting line and above the field corresponding to the peak in the {open_quote}{open_quote}fishtail{close_quote}{close_quote} magnetization. In this range the activation energy {ital U}{sub pl}, which decreases with field, drops below the elastic (collective) creep activation energy, {ital U}{sub el}, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}. {copyright} {ital 1996 The American Physical Society.}
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c8fed287c2cd24edc74f41b29e035da9 https://doi.org/10.1103/physrevlett.77.1596 Zobrazit plný text záznamu