Published August 1996 | Version v1
Journal article Metadata-only

Plastic Vortex Creep in YBa2Cu3O7-x Crystals

Creators

  • 1. Institute of Superconductivity, Department of Physics, Bar-Ilan University, Ramat-Gan 52900 (Israel)
  • 2. Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100 (Israel)
  • 3. Forschungszentrum Karlsruhe, Institut fuer Technische Physik and Universitaet Karlsruhe, D-76021 Karlsruhe (Germany)
  • 4. and L.D. Landau Institute for Theoretical Physics, 117940 Moscow (Russia)
  • 5. Theoretische Physik, Eidgenoessische Technische Hochschule Zuerich-Hoenggerberg, CH-8093 Zuerich, Switzerl
  • 6. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Description

Local magnetic relaxation measurements in YBa2Cu3O7-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 Upl, which decreases with field, drops below the elastic (collective) creep activation energy, Uel, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa2Cu3O7-x. copyright 1996 The American Physical Society

Additional details

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
77
Journal Issue
8
Journal Page Range
p. 1596-1599.
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
28000377
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
BARIUM OXIDES; COPPER OXIDES; CREEP; DISLOCATIONS; DYNAMICS; ELASTICITY; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; PLASTICITY; YTTRIUM OXIDES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; LINE DEFECTS; MECHANICAL PROPERTIES; MECHANICS; OXIDES; OXYGEN COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS