A Comment on ``Superconducting-Normal Phase Transition in (Ba1-xKx)BiO3, x = 0.40, 0.47'' by B. F. Woodfield, D. A. Wright, R. A. Fisher, N. E. Phillips and H. Y. Tang, Phys. Rev. Lett. 83, 4622 (1999)

Abstract

This comment addresses criticisms of our PRL 82 (1999) p. 4532-4535 (cond-mat/9904288) raised by Woodfield et al. in their recent PRL. We find that the critical fields in single crystals of Ba1-xKxBiO3 (x = 0.4) have anomalous temperature dependecies which suggests that the superconducting phase transition in this material is not of order II.