Disorder-Induced Transition to Entangled Vortex Solid in Nd-Ce-Cu-O Crystal

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.2542· OSTI ID:542689

Giller, D; Shaulov, A; Prozorov, R; Abulafia, Y; Wolfus, Y; Burlachkov, L; Yeshurun, Y ^[1]; Zeldov, E ^[2]; Vinokur, V M ^[3]; Peng, J L; Greene, R L ^[4]

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1. Center for 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. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
4. Department of Physics and Center for Superconductivity Research, University of Maryland, College Park, Maryland 20742 (United States)

Local magnetic measurements in a highly anisotropic Nd-Ce-Cu-O crystal reveal a sharp onset of an anomalous magnetization peak at a {ital temperature-dependent} field B{sub on} . The same field marks a change in the field profiles across the sample, from profiles dominated by geometrical barriers below B{sub on} to Bean-like profiles above it. The temperature dependence of B{sub on} and the flux distribution above and below B{sub on} imply a disorder-induced transition at B{sub on} from a relatively ordered vortex lattice to a highly disordered, entangled vortex solid. Local magnetic relaxation measurements above B{sub on} show evidence for plastic vortex creep associated with the motion of dislocations in the entangled vortex structure. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 542689
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM OXIDES
COPPER OXIDES
DISLOCATIONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MAGNETIZATION
MIXED STATE
MONOCRYSTALS
NEODYMIUM OXIDES
TEMPERATURE DEPENDENCE
VORTICES