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Title: Magnetoresistance and conductivity fluctuations in single crystalline bi1.7pb0.3sr1.9cacu1.9o8+x
Authors: Fu, Cm
Boon, Willy
Wang, Ys
Moshchalkov, Victor
Bruynseraede, Yvan
Issue Date: Sep-1992
Publisher: Elsevier science bv
Series Title: Physica c vol:200 issue:1-2 pages:17-22
Abstract: The magnetoresistance of a Bi1.7Pb0.3Sr1.9CaCu1.9O8+x single crystal with T(c) = 91.5 K has been investigated in pulsed magnetic fields up to 22 T and in the temperature range T = (67-100)K. The experimental data at T< T(c) are scaled with the Larkin two-dimensional fluctuation expression. It is shown that the resistive transition widening in a magnetic field, which suppresses the phase coherence between the superconducting CuO2 planes, enables one to treat these planes as independent two-dimensional superconducting sheets with giant conductivity fluctuations. The magnetoresistance and excess conductivity above T(c) are analysed in the framework of the Aslamazov-Larkin model.
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: DI
Appears in Collections:Solid State Physics and Magnetism Section

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