Electronic and magnetic states in metallic compound-II. Electron transport and magnetic susceptibility in NiAl and FeAl

G. R. Caskey, J. M. Franz, D. J. Sellmyer

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Electron transport and magnetic properties were investigated in NiAl and FeAl alloys in the vicinity of exact stoichiometry. The results as well as those of other workers were compared with recent augmented-plane-wave band calculations for NiAl, and semiquantitative agreement was found. With respect to impurity states in NiAl, it was concluded that transport anomalies, though definitely magnetic in origin, were not due to localized-magnetic moments on excess Ni atoms on Al sites. It was suggested that the anomalies may be due to subtle structural defects or such defects in combination with one of several intrinsic (non-impurity or defect) mechanisms. In the FeAl alloys, it was concluded that excess Fe atoms on Al sites (Fex atoms) carry a moment in the paramagnetic state of 7·8 μB. Negative magneto-resistance but no resistance minima effects were observed. The data, similar in several respects to those for dilute Rh(Fe) alloys, were interpreted in terms of antiferromagnetically coupled Fex atoms which lead to magnetic transitions of a spin-glass or mictomagnetic nature, that is, having no long-range order.

Original languageEnglish (US)
Pages (from-to)1179-1198
Number of pages20
JournalJournal of Physics and Chemistry of Solids
Volume34
Issue number7
DOIs
StatePublished - Jul 1973

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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