Superconductivity and antiferromagnetism in heavy-fermion metals: Coexistence and competition
Conference
·
OSTI ID:425964
- Institut fuer Festkoeperphysik, Darmstadt (Germany); and others
The authors address the relationship between heavy-fermion (HF) superconductivity (sc) and antiferromagnetic order (afm) in U- and Ce-based compounds. Usually, sc and small-moment afm coexist in U-systems (e.g. UPt{sub 3} and URu{sub 2}Si{sub 2}). For CeCu{sub 2}Ge{sub 2}, on the other hand, external pressure was found to suppress large-moment afm, before sc develops at p {approx_gt} 7 GPa. As is discussed in the present paper, in UPd{sub 2}Al{sub 3} sc even coexists with large-moment afm, and in CeCu{sub 2}Si{sub 2} sc competes with and expells {open_quotes}phase A{close_quotes} (presumably a disordered phase of low-moment afm). The authors advocate that the difference in the phenomenological behavior of Ce- and U-compounds is related to differences in the electronic structures of their open 4f and 5f shells.
- OSTI ID:
- 425964
- Report Number(s):
- CONF-9505186--
- Country of Publication:
- United States
- Language:
- English
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