Phenomenological criteria for ferromagnetism and spin-density waves in Ce compounds and other narrow-band metals (abstract)

L. E. De Long, J. G. Huber, K. Bedell

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2 Scopus citations

Abstract

Recent data suggest that ferromagnetic Ce compounds are only found for a restricted range of Ce-Ce distance1: 3.65 Å≤d≤3.83 Å. This hypothesis will be compared to the "R-γ*" correlation,2 which states that magnetic order can only occur when the electronic heat capacity coefficient γ*≥γ@B|m ≊3.5×104 erg cm-3 K2. Additional analysis suggests that, as a function of increasing γ*, weak ferromagnetism first occurs as γ* initially surpasses γ*m, yielding to antiferromagnetism at higher γ*. Materials such as URu2Si2 constitute evidence that a third region of spin-density-wave order preceeds that of ferromagnetism for γ*≊γ@B|m. Spin-density-wave order also competes with antiferromagnetism and coexists with heavy fermion superconductivity in the case of CeCu2Si2 and UPt 3 (and possibly UBe13) in a narrow region about γ*≊1×105 erg cm-3 K 2. The temporary stability of ferromagnetism may be explained by the wave-vector dependence of the electronic self-energy that is responsible for heavy fermion behavior.

Original languageEnglish
Pages (from-to)5222
Number of pages1
JournalJournal of Applied Physics
Volume67
Issue number9
DOIs
StatePublished - 1990

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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