Hyperfine Interactions

, Volume 28, Issue 1–4, pp 561–564 | Cite as

Mössbauer studies of ZnCr2xGa2−2x O4 spinel solid solutions: A cluster spin glass for 0.6 ≲x ≲ 0.85

  • J. L. Dormann
  • A. Saifi
  • D. Fiorani
Magnetism, Hyperfine Fields

Abstract

Mössbauer studies of topologically frustrated ZnCr2xGa2−2xO4 system (0.6 ⩽ x ⩽ 1) are performed. Almost all the spectra consist of a superposition of a paramagnetic doublet and an enlarged magnetic hyperfine pattern. Two models are used to fit the spectra, a static hyperfine field distribution method and a superparamagnetic type relaxation simulation method. In the composition range 0.6 ⩽ x ⩽ 0.85, for which spin glass behavlour has been evidenced, only the second model gives coherent results rather in agreement to a dynamic non equilibrium process with a progressive freezing of cluster moment.

Keywords

Spin Glass Hyperfine Field Equilibrium Process Distribution Method Magnetic Hyperfine 

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Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1986

Authors and Affiliations

  • J. L. Dormann
    • 1
  • A. Saifi
    • 1
  • D. Fiorani
    • 2
  1. 1.Laboratoire de MagnétismeCNRSMeudon Principal CedexFrance
  2. 2.ITSE, CNRMonterotondo StazioneItaly

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