Actions for Effect of twin boundary density on the vortex melting transition in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals [electronic resource].

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Effect of twin boundary density on the vortex melting transition in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals [electronic resource].

Published
Arlington, Va. : National Science Foundation (U.S.), 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
7 pages : digital, PDF file
Additional Creators
Argonne National Laboratory, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The authors present magnetotransport ρ(H,T) measurements in clean untwinned and twinned crystals of YBa₂Cu₃O{sub 7−δ} in magnetic fields up to 8 Tesla for H ∥ c. In untwinned crystals, they show strong support for a vortex solid to liquid first order melting transition at a temperature T{sub m}, much below the mean field transition temperature T{sub c}(H), characterized by an extremely sharp drop in resistivity ρ(T{sub m}) and the appearance of hysteretic behavior at ρ(H{sub m}). In densely twinned crystals, the sharp transition is replaced with a continuous transition at a higher temperature T{sub BG} > T{sub m}. Furthermore, the cusp in T{sub BG}(θ) predicted by the Bose glass theory at fixed field is observed. In dilutely twinned crystals they demonstrate the competing effect of pinning and freezing at the phase transition. The vortex solid state at low fields is characterized by the appearance of a ``peak effect`` just below the melting temperature.
Report Numbers
E 1.99:anl/msd/cp--82175
E 1.99: conf-940122--2
conf-940122--2
anl/msd/cp--82175
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Note
Published through SciTech Connect.
01/01/1994.
"anl/msd/cp--82175"
" conf-940122--2"
"DE94007684"
": Contract DMR 91-20000"
7. IWCC international workshop on critical currents in superconductors,Alpbach (Austria),24-27 Jan 1994.
Crabtree, G.W.; Kwok, W.K.; Welp, U.; Fendrich, J.; Fleshler, S.
Funding Information
W-31109-ENG-38
View MARC record | catkey: 14455956