Two-dimensional vortex dynamics inYBa2Cu3O7/PrBa2Cu3O7multilayers

Autor:	L Li, SQ Guo, BR Zhao, JL Zhang, XG Qiu, M Tachiki
Rok vydání:	1993
Předmět:	Nonlinear system Materials science Creep Condensed matter physics Condensed Matter::Superconductivity Lattice (order) Perpendicular Activation energy Vorticity Vortex Magnetic field
Zdroj:	Physical Review B. 48:16180-16183
ISSN:	1095-3795 0163-1829
Popis:	We have measured the current-voltage characteristics of an YBa 2 Cu 3 O 7 /PrBa 2 Cu 3 O 7 multilayer in perpendicular magnetic fields. A dislocation-mediated melting behavior of the two-dimensional vortex lattice (VL) is identified. Below the melting field, the vortex motion is found to undergo a crossover from elastic motion to plastic motion when the activation energy for the collective creep exceeds the formation energy of dislocation pairs in the VL at low currents. Above the melting field, the vortices are in a pinned liquid state with the I-V curves characterized by a linear behavior at small currents, changing to a nonlinear behavior at large currents
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29b7837d7ca23784985485e2c337d381 https://doi.org/10.1103/physrevb.48.16180 Zobrazit plný text záznamu