The effect of correlated and point defects on the vortex lattice melting transition in single crystal YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}

Conference · Sun Aug 01 00:00:00 EDT 1993

OSTI ID:10185369

Kwok, W K; Fleshler, S; Welp, U; Downey, J; Crabtree, G W ^[1]; Fendrich, J ^[1]; Giapintzakis, J ^[2]

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1. Argonne National Lab., IL (United States)
2. Iowa State Univ. of Science and Technology, Ames, IA (United States). Dept. of Physics and Astronomy; Illinois Univ., Urbana, IL (United States)

The vortex melting transition T{sub m} in several untwinned and twinned crystals measured resistively in fields up to 8 Tesla. A Lindemann criterion for vortex lattice melting is obtained in addition to a sharp hysteresis in the magnetoresistance at B{sub m} supporting a first order phase transition. The anisotropy of twin boundary pinning and its reduction of the ``kink`` in {rho}(T) associated with the first order melting transition is discussed in samples with very dilute twin boundaries. We also report on direct suppression of melting transition by intrinsic pinning for H {parallel} ab and by electron-irradiation-induced point defects.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10185369
• Report Number(s): ANL/MSD/CP--80634; CONF-930801--12; ON: DE93040277; CNN: Contract DMR91-20000
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202
BARIUM OXIDES
COPPER OXIDES
ELECTRON BEAMS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETORESISTANCE
MELTING
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
STRUCTURE AND PHASE STUDIES
VORTICES
YTTRIUM OXIDES