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SmCo5/-Fe nanocomposite material obtained by mechanical milling and annealing

V. POP1,2,* , O. ISNARD2, I. CHICINA3, D. GIVORD4, J. M. LE BRETON5

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
  2. Laboratoire de Cristallographie, CNRS, BP166, University J. Fourier, 38042 Grenoble, Cédex 9, France
  3. Materials Sciences and Technology Dept., Technical University of Cluj-Napoca, 103-105 Muncii ave., 400641 Cluj Napoca, Romania
  4. Laboratoire de Magnétisme Louis Néel, CNRS, BP166, F-38042 Grenoble, Cédex 9, France
  5. Groupe de Physique des Matériaux, UMR CNRS 6634, Université de Rouen, 76801 Saint Etienne du Rouvray cedex, France

Abstract

The influence of the milling and annealing conditions on the structural and magnetic behaviour of mechanically-milled SmCo5/-Fe aloys has been studied. The structural evolution of the samples was followed by X-ray diffraction. The width of the hard magnetic phase diffraction peaks increases with miling time, then the peaks almost disappear for eight hours of miling. The characteristic diffractions peaks of the SmCo5-type phase are restored during subsequent heat treatment. The coercive field, the remanent magnetisation and the degree of the exchange coupling between the hard magnetic grains and the soft -Fe grains were studied by magnetic measurements, performed in magnetic fields up to 10 Tesla and temperatures between 4 K and 300 K as wel as by Mössbauer spectrometry..

Keywords

Spring magnets, Mechanical milling, Hysteresis, Mössbauer spectrometry, SEM.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

V. POP, O. ISNARD, I. CHICINA, D. GIVORD, J. M. LE BRETON, SmCo5/-Fe nanocomposite material obtained by mechanical milling and annealing, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 494-500 (2006)