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STRUCTURAL RELAXATION IN Fe70Cr10.5P11.5Mn1.5C6.5 AMORPHOUS ALLOY

I. Mihalca1,* , A. Ercuta2

Affiliation

  1. University “Politehnica”, Physics Department, 1 P-ta Regina Maria, 1900 Timisoara, Romania
  2. West University, Faculty of Physics, 4 V. Parvan Bul., 1900 Timisoara, Romania

Abstract

The changes in the Curie temperature and magnetostriction subsequent to structural relaxation by isothermally annealing amorphous ribbons of nominal composition Fe70Cr10.5P11.5Mn1.5C6.5 were examined. The alloy is low magnetostrictive in both native and relaxed states, but significant enhancement, from 0.5 ppm to 10.4 ppm, of the saturation magnetostriction coefficient was observed. The relaxation was attributed to free volumes annealing out and short range order changes, both topological and chemical. A value ~ 0.85 eV of the effective activation energy resulted from the analysis of the process kinetics..

Keywords

Ferromagnetic amorphous alloys, Curie temperature, Magnetostriction, Structure relaxation kinetics, Effective activation energy.

Submitted at: Jan. 16, 2003
Accepted at: March 12, 2003

Citation

I. Mihalca, A. Ercuta, STRUCTURAL RELAXATION IN Fe70Cr10.5P11.5Mn1.5C6.5 AMORPHOUS ALLOY, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 1, pp. 245-250 (2003)