Magnetic quantum critical point and superconductivity in UPt3 doped with Pd

Reference:

de Visser, A., Graf, M. J., Estrela, P., Amato, A., Baines, C., Andreica, D., Gygax, F. N. and Schenck, A., 2000. Magnetic quantum critical point and superconductivity in UPt3 doped with Pd. Physical Review Letters, 85 (14), pp. 3005-3008.

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Official URL:

http://link.aps.org/doi/10.1103/PhysRevLett.85.3005

Abstract

Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt3 doped with small amounts of Pd. We find that the critical Pd concentration for the emergence of the large-moment antiferromagnetic phase is similar to 0.6at.%Pd. At the same Pd content, superconductivity is completely suppressed. The existence of a magnetic quantum critical point in the phase diagram, which coincides with the critical point for superconductivity, provides evidence for ferromagnetic spin-fluctuation mediated odd-parity superconductivity, which competes with antiferromagnetic order.

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