Anomalous Field-Induced Resistive Transition in La2-xSrxCuO4

Authors:
  • MSMinoru Suzuki
    Minoru Suzuki
  • MHMakoto Hikita
    Makoto Hikita

Abstract
We have observed a drastic change in magnetic-field-induced resistive transition behavior in La2-x Sr x CuO4 as x increases from 0.1 to 0.3. For x≤0.15, applying a field induces development of a tail in the resistive transition curve, while for x=0.3, it merely causes parallel shift of the curve to lower temperatures, which is common to conventional type II superconductors. By analyzing field-dependent fluctuation conductivity, it is shown that this change in resistive transition is accompanied by a dramatic increase in coherence length in the CuO plane when x approaches 0.3.

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