Uranium-based heavy-fermion superconductors: an experimental survey

The uranium-based heavy-fermion superconductors were discovered almost one decade ago. Here, we present an experimental survey of their interesting normal and superconducting state properties. It appears that most of the unusual normal-state properties can be attributed to the proximity of an antife...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1991-11, Vol.100 (1), p.204-217
Main Authors: de Visser, A., Franse, J.J.M.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Metals. Metallurgy
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:The uranium-based heavy-fermion superconductors were discovered almost one decade ago. Here, we present an experimental survey of their interesting normal and superconducting state properties. It appears that most of the unusual normal-state properties can be attributed to the proximity of an antiferromagnetic instability and the presence of competing electronic interactions. The discovery of a superconducting instability in these strongly-correlated electron systems came totally unexpected. The parameters describing the superconducting state yield strong deviations from the standard BCS behaviour. Accumulating evidence has been gathered for a nontrivial superconducting pair function ( L ≠ 0). We illustrate recent developments by a number of prime studies, like high-field measurements and alloying experiments, and give special attention to multicomponent superconductivity in UPt 3 and (U, Th)Be 13.
ISSN:0304-8853
DOI:10.1016/0304-8853(91)90821-Q