Title: Vortex melting and decoupling transitions in YBa2Cu4O8 single crystals
Authors: Qiu, XG ×
Moshchalkov, Victor
Karpinski, J #
Issue Date: 2000
Series Title: Physical review. B, Condensed matter vol:62 issue:6 pages:4119-4123
Conference: date:Katholieke Univ Leuven, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium; RIKEN, Inst Phys & Chem Res, Photodynam Res Ctr, Aoba Ku, Sendai, Miyagi 9800868, Japan; ETH Honggerberg, Festkorperphys Lab, CH-8093 Zurich, Switzerland
Abstract: The vortex correlation along the c axis in high quality single crystals of YBa2Cu4O8 has been investigated as a function of temperature T in different magnetic fields, using the flux transformer configuration. ii simultaneous sharp drop associated with the vortex lattice melting is observed in both the primary and secondary voltages (V-top and V-bot) Just above the melting temperature, the vortices form three-dimensional line Liquid with the correlation length along the c direction L(c)less than or equal to t, the sample thickness. The temperature where a resistive peak in R-bot develops corresponds to the decoupling temperature T-d at which the vortices lose their correlation along the c direction and they dissolve into the two-dimensional pancake vortices. The H-T phase diagram for the YBa2Cu4O8 single crystal is obtained.
ISSN: 0163-1829
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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