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Critical current density; magnetic field dependence; high temperature super-conductivity

We have measured the transport critical current densityJ_cof sintered YBa₂Cu₃O₇, in various applied fields up to 185 Oe at 77 K. We find a sharp decay ofJ_cwith magnetic field. We show that this sharp decay is consistent with the low field hysteresis results of Groveret al. We argue that the observed field dependence is not caused by intragranular weak links.

P K Mishra¹ G Ravi Kumar¹ P Chaddah¹ B A Dasannacharya¹ M K Malik^{1 2}

1. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
2. Atomic Fuels Division, Bhabha Atomic Research Centre, Bombay - 400 085, India

Published

October 1988

Manuscript received

7 July 1988