EVIDENCE FOR A POSSIBLE ORDER-DISORDER TRANSITION IN THE JOSEPHSON JUNCTION LATTICE OF A GRANULAR La1.85Sr0.15CuO4 SUPERCONDUCTING OXIDE

1 August 1987

journal article
Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics B

Vol. 1 (3) , 1011-1016
https://doi.org/10.1142/s0217979287001481

Abstract

We present a detailed low field susceptibility study of a sintered La_1.85Sr_0.15CuO₄ superconductor. We find that two critical temperatures should be considered in order to explain our observations. The lower one is characteristic of an order-disorder transition in the Josephson Junction lattice and scales as H ^.55. Moreover, it is inferred that field cooled data do not give the true bulk Meissner effect.

Keywords

SUPERCONDUCTORS
CRITICAL TEMPERATURE
JOSEPHSON JUNCTION

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