RT Journal Article
T1 Vortex liquid entanglement in twinned YBa_2Cu_3O_7 /Y_2BaCuO_5 composite superconductors
A1 Puig, T.
A1 Galante, F.
A1 González Herrera, Elvira María
A1 Vicent López, José Luis
A1 Martínez, B.
A1 Obradors, X.
AB The angular dependence of the in-plane resistivity ρ(T,H, θ) of melt textured YBa_2Cu_3O_7/Y_2BaCuO_5 composites has been measured in a large range of magnetic fields and temperatures and from them, the intrinsic anisotropy of the superconducting state has been verified following the anisotropic Ginzburg-Landau approach. The influence of correlated defects like twin boundaries and quenched disorder generated by Y_2BaCuO_5 precipitates on the pinning behavior of these composites in the liquid vortex state is analyzed, and the corresponding phase diagram is determined and compared to that of twinned single crystals. We show that the irreversibility line displays an upwards shift due to twin boundary pinning enabling to define a ''quenched'' Bose glass transition. A new region in the vortex liquid state is identified where twin boundary pinning defines a partially entangled liquid vortex state characterized by a short-range c-axis vortex coherence. The transition to the entangled liquid phase is experimentally determined. The relevance of this depinning line and its unique position with respect to twinned single crystals is discussed. [S0163- 1829(99)01741-5].
PB American Physical Society
SN 1098-0121
YR 1999
FD 1999-11-01
LK https://hdl.handle.net/20.500.14352/60179
UL https://hdl.handle.net/20.500.14352/60179
LA eng
NO ©1999 The American Physical Society.Financial support from CICYT (Nos. MAT96-1052 and MAT96-904), Generalitat de Catalunya (No. 1997 SGR 26), and Supercurrents (EU-TMR Network No. ERBFMRXCT98-01289) is acknowledged. T.P. wishes to thank Ministerio de Educación y Cultura (Programa Incorporación de Doctores) for financial support.
NO CICYT
NO Generalitat de Catalunya
NO Supercurrents (EU-TMR Network)
DS Docta Complutense
RD 18 may 2024