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The ferro- and ferrimagnetic — spin glass transition as studied by Mössbauer spectroscopy

  • R. A. Brand
  • V. Manns
  • W. Keune
Experimental Papers
Part of the Lecture Notes in Physics book series (LNP, volume 192)

Abstract

We show in the examples of Au-16.8 at% Fe, the metallic glass Fe xNi78−xSi9B13 and the spinel Mg1+tFe2−2t TitO4 that the transition from ferro-(first two), or ferri magnetic (last) to a spin-glass-like state can be determined by Mössbauer spectros copy. Spectra taken in external magnetic field show that strong spin canting starts at this transition, while in zero external field the transition is accompanied by an anomalous increase in the saturation average hyperfine field in the low temperature state, proportional to the average magnetic moment. These results indicate that the transition is not simply a spin rotation, but is the condensation of transverse spin degrees of freedom in the spin-glass-like state, as in recent models for Heisenberg infinite ranged and short ranged spin glasses.

Keywords

External Field Metallic Glass Spin Glass Hyperfine Field Magnetic Phase Diagram 
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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • R. A. Brand
    • 1
  • V. Manns
    • 1
  • W. Keune
    • 1
  1. 1.Laboratorium für Angewandte PhysikUniversität DuisburgDuisburgGermany

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