Self-consistent perturbation theory for dynamics of valence fluctuations - IV. Tm systems with two magnetic valence states

Yoshio Kuramoto

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Dynamical property of an intermediate-valence Tm ion in a metallic matrix is investigated by the use of the self-consistent perturbation theory. Both of the fluctuating valence states in Tm have nonzero angular momentum in contrast to Ce and Yb systems. It is shown that the participation of two valence states in the magnetic susceptibility leads to peculiar magnetic properties such as enhanced Korringa-type magnetic relaxation and a systematic deviation from the Curie-Weiss law of the susceptibility. The susceptibility diverges in the zero-temperature limit. The dynamical susceptibility can be fitted by the Lorentzian lineshape very well for a wide frequency and temperature range. The single-particle excitation spectrum is also derived from which the resistivity is calculated. A logarithmic increase of the resistivity with decreasing temperature is found.

Original languageEnglish
Pages (from-to)29-37
Number of pages9
JournalZeitschrift für Physik B Condensed Matter
Volume65
Issue number1
DOIs
Publication statusPublished - 1986 Mar 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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