Anomalous Superconductivity and Antiferromagnetism in the U(Pt,Pd)_3 System

• Authors: J. Franse
• Languages of publication: EN

Abstracts

EN

A review is presented of the anomalous magnetic and superconducting properties of the heavy-fermion compound UPt_3 that has been a subject of extensive study during the past twenty years. The normal-state and superconducting properties of the compound were evaluated from magnetic, transport, and thermodynamic studies. In addition, neutron-diff raction and muon spin relaxation experiments were performed in the normal and superconducting states. The compound is characterized by a multiple superconducting phase diagram and by the coexistence of superconductivity and short-range antiferromagnetic interactions with quasi-static moments of the order of 10^{-2}μ_B/U-atom. Upon substituting Pt by Pd, the short-range magnetic interactions give way to long-range antiferromagnetic order with a maximal ordering temperature of 6 K for the 5 at.% Pd alloy and a magnetic moment of 0.6μ_B/U-atom. Superconductivity and long-range antiferromagnetic order are in competition resulting in a critical composition of 0.6 at.% Pd. At this concentration, non-Fermi liquid behaviour is observed.

Keywords

EN

71.27.+a; 74.70.Tx; 75.30.Mb

Discipline

• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)
• 74.70.Tx: Heavy-fermion superconductors(for heavy-fermion systems in magnetically ordered materials, see 75.30.Mb; see also 71.27.+a Strongly correlated electron systems, heavy fermions)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: Supplement
• Pages: 153-176

Dates

published

2001-12

received

2001-10-20

Contributors

author

J. Franse

• Universiteit van Amsterdam, Spui 21, Amsterdam, The Netherlands

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Identifiers

DOI

10.12693/APhysPolA.100.153