Electrical resistivity and magnetic susceptibility in the amorphous CrxGe1-x alloy system

Tetsuya Sato, A. Jono, E. Ohta, M. Sakata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The electrical resistivity and magnetic susceptibility of amorphous CrxGe1-x alloys (0x0.65) prepared by means of the flash-evaporation method were investigated in relation to the amorphous structure. The partial pair distribution function determined by the x-ray diffraction method shows a change from the tetrahedral random network to the dense-random-packing structure with increasing Cr content. The electrical resistivity shows a transition from semiconductorlike conduction to metal-like conduction in accordance with the structure change. On the basis of the idea of Motts hopping conduction, the density of states at the Fermi level increases with increasing Cr content and the length of decay of a localized wave function decreases with decreasing substrate temperature during evaporation. An increase in the Fermi level was deduced from analysis of the metallic conduction in terms of the Baym-Faber-Ziman theory incorporating electron mean-free-path effects. The magnetic susceptibility shows the Curie-Weiss-like behavior characterized by a significantly small localized moment per Cr atom (eff0.4B). The small moment is discussed on the basis of the idea of the virtual bound state, with local environment effects taken into account.

Original languageEnglish
Pages (from-to)11741-11750
Number of pages10
JournalPhysical Review B
Volume38
Issue number16
DOIs
Publication statusPublished - 1988

Fingerprint

Fermi level
Magnetic susceptibility
Evaporation
magnetic permeability
conduction
electrical resistivity
Wave functions
Distribution functions
Diffraction
Metals
evaporation
environment effects
moments
X rays
Atoms
Electrons
Substrates
mean free path
flash
x ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electrical resistivity and magnetic susceptibility in the amorphous CrxGe1-x alloy system. / Sato, Tetsuya; Jono, A.; Ohta, E.; Sakata, M.

In: Physical Review B, Vol. 38, No. 16, 1988, p. 11741-11750.

Research output: Contribution to journalArticle

Sato, Tetsuya ; Jono, A. ; Ohta, E. ; Sakata, M. / Electrical resistivity and magnetic susceptibility in the amorphous CrxGe1-x alloy system. In: Physical Review B. 1988 ; Vol. 38, No. 16. pp. 11741-11750.
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