Gruner, Markus Ernst; Meyer, Ralf; Entel, Peter:
Monte Carlo simulations of high-moment - low-moment transitions in Invar alloys
1998
In: The European Physical Journal B, Jg. 2 (1998), Heft 1, S. 107 - 119
Artikel/Aufsatz in Zeitschrift / Fach: Physik
Titel:
Monte Carlo simulations of high-moment - low-moment transitions in Invar alloys
Autor(in):
Gruner, Markus Ernst im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Meyer, Ralf im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Entel, Peter im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen
Erscheinungsjahr
1998
Erschienen in:
The European Physical Journal B, Jg. 2 (1998), Heft 1, S. 107 - 119
WWW URL
WWW URL

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 T_C,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.