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Structural Phase Transition in the Superconducting Pyrochlore Oxide Cd2Re2O7

M. Hanawa·J. Yamaura·Y. Muraoka·F. Sakai·Z. Hiroi
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Abstract

We report a structural phase transition found at Ts = 200 K in a pyrochlore oxide Cd2Re2O7 which shows superconductivity at Tc = 1.0 K. X-ray diffractionexperiments indicate that the phase transition is of the second order, from a high-temperature phase with the ideal cubic pyrochlore structure (space group Fd-3m) to a low-temperature phase with another cubic structure (space group F-43m). It is accompanied by a dramatic change in the resistivity and magnetic susceptibility and thus must induce a significant change in the electronic structure of Cd2Re2O7.

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M. Hanawa, J. Yamaura, Y. Muraoka, F. Sakai, Z. Hiroi. 2001-09-04. Structural Phase Transition in the Superconducting Pyrochlore Oxide Cd2Re2O7. https://doi.org/10.1016/s0022-3697(02)00090-2

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