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Monte Carlo simulations of high-moment - low-moment transitions in Invar alloys

  • M.E. Gruner
  • R. Meyer
  • P. Entel
Article

Abstract:

We have reproduced magneto-volume effects typical for Invar alloys by examining a spin-analogous model which describes coupled spatial and magnetic degrees of freedom and, additionally, chemical disorder. Constant pressure Monte Carlo simulations of this model show an almost vanishing thermal expansion over a broad range of temperatures below TC,a softening of the bulk modulus and the absence of a sharp peak in the specific heat at the magnetic phase transition as observed in Fe65Ni35 Invar.

PACS. 75.50.Bb Fe and its alloys - 75.80.+q Magnetomechanical and magnetoelectric effects, magnetostriction 75.40.Cx Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • M.E. Gruner
    • 1
  • R. Meyer
    • 1
  • P. Entel
    • 1
  1. 1.Theoretische TieftemperaturphysikGerhard-Mercator-Universität - Gesamthochschule - DuisburgDuisburgGermany

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