INVESTIGATION OF THE ELECTRICAL-RESISTIVITY BEHAVIOR BETWEEN THE KOSTERLITZ-THOULESS TEMPERATURE AND THE GINZBURG-LANDAU TEMPERATURE IN SPRAY-DRIED BULK BI2SR2CACU2O8+D - THE ROLE OF 2-DIMENSIONAL FLUCTUATIONS AND DEFECTS
Ausloos, Marcel; Bougrine, Hassan; DUVIGNEAUD, P. H.et al.
1995 • In Physica C. Superconductivity, 251 (3-4), p. 337-347
[en] The resistive transition R(T) between the Kosterlitz-Thouless temperature and the Ginzburg-Landau temperature was studied in spray-dried bulk Bi2Sr2CaCu2O8+d superconductors for a magnetic-field range between 0 and 0.3 T. The samples were prepared by the spray-drying technique with Bi2+xSr2-x-yCa2+yCu2O8+d for x = y = 0.05 or 0.1 as a starting composition here. The data analysis was performed assuming various resistive laws previously proposed. When numerically analyzed in terms of a two-dimensional Kosterlitz-Thouless theory the results lead to remarkable quantitative agreement. This implies that the R(T) behavior can be described within a picture of a highly two-dimensional behavior of macroscopic fluctuations of vortex-antivortex depairing type. The role of defects or inhomogeneities in the resistive behavior is outlined.
Disciplines :
Physics
Author, co-author :
Ausloos, Marcel ; Université de Liège - ULiège > Département de physique > Physique statistique appliquée et des matériaux - S.U.P.R.A.S.
Bougrine, Hassan ; Université de Liège - ULiège > CARE "Le Réseau des bibliothèques" > Bibliothèque des Sciences et Techniques
DUVIGNEAUD, P. H.
GUO, Y. F.
Language :
English
Title :
INVESTIGATION OF THE ELECTRICAL-RESISTIVITY BEHAVIOR BETWEEN THE KOSTERLITZ-THOULESS TEMPERATURE AND THE GINZBURG-LANDAU TEMPERATURE IN SPRAY-DRIED BULK BI2SR2CACU2O8+D - THE ROLE OF 2-DIMENSIONAL FLUCTUATIONS AND DEFECTS
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