Abstract

The thermal conductivity of the antiferromagnetic organic superconductor κ-(BETS)2FeBr4 was measured in oriented magnetic field. Both the antiferromagnetic state with TN=2.3 K and the superconducting state with Tc=1.1 K are shown to be of bulk nature. In the parallel fields above 10 T the thermal conductivity shows an anomaly, being consistent with the formation of a reentrant superconducting state due to a Jaccarino–Peter effect.

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