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Anisotropy in Normal and Superconducting Properties of Single Crystalline (La1−xSrx)2CuO4

Published online by Cambridge University Press:  21 February 2011

K. Kitazawa ,
S. Kambe ,
A. Fukuoka ,
M. Naito ,
I. Tanaka  and
H. Kojima
K. Kitazawa
Affiliation:
Department of Industrial Chemistry, University of Tokyo, Hongo, Tokyo 113
S. Kambe
Affiliation:
Department of Industrial Chemistry, University of Tokyo, Hongo, Tokyo 113
A. Fukuoka
Affiliation:
Department of Industrial Chemistry, University of Tokyo, Hongo, Tokyo 113
M. Naito
Affiliation:
Fundamental Research Laboratory, NTT, Midoricho, Musashino-shi, Tokyo 180
I. Tanaka
Affiliation:
Institute of Inorganic Synthesis, Yamanashi University, Takeda, Kofu 400
H. Kojima
Affiliation:
Institute of Inorganic Synthesis, Yamanashi University, Takeda, Kofu 400
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Abstract

Transport measurements were made on single crystals of (La1−xSrx)2CuO4 (x = 0.06 and 0.07) which have sizes large enough so that resistivity could be measured reliably along the c-axis by the usual 4 probe method. It was found that conduction along the c-axis was semiconductive in the low temperature orthorhombic structural region, while it was metallic in the high temperature tetragonal region. The resistivity in the basal plane, however, was not affected by the structural phase transition but could be fitted by the T1.3 dependence over the whole temperature range below 300K. The resistive superconducting transition was found to spread significantly under a magnetic field along the c-axis. But the degree of the spreading was essentially independent of the direction of the measurement current. The results suggest that LSCO is a typical 2D metal but with an unusual conduction mechanism and that its superconducting transition is overwhelmed by critical fluctuation under a magnetic field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 156: Symposium M – High Temperature Superconductors: Relationships Between Properties, Structure, and Solid State Chemistry , 1989 , 153
Copyright
Copyright © Materials Research Society 1989

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References

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