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Magnetic quantum critical point and superconductivity in UPt3 doped with Pd

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arxiv cond-mat/0006321 v2 pith:MF4T225H submitted 2000-06-21 cond-mat.str-el cond-mat.supr-con

A. de Visser , M.J. Graf , P. Estrela , A. Amato , C. Baines , D. Andreica , F.N. Gygax , A. Schenck This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords criticalsuperconductivitypointantiferromagneticdopedmagneticphasequantum
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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 ~0.6 at.%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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