Ordering and Magnetoelastic Properties of Fe-Ga Alloy
K. Perduta a, J. Olszewski b, S. Busbridge a, and M. Nabiałek b
a School of Environment and Technology, University of Brighton, Lewes Road, BN2 4GJ Brighton, United Kingdom
b Institute of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
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Received: 08 06 2008
In this paper the investigations of the ordering, microstructure and magnetomechanical properties of the Fe80Ga20 alloy and its composites are presented. The composites consisted of the Fe-Ga particles with a size distribution in the range between 20 and 50 μm. These particles were produced by blade-milling of arc-melted alloy. After milling the powders were annealed at 723 K for 2.5, 7.5, and 12.5 h. The epoxy-bonded composites in rectangular shape were made from the as-cast as well as from the annealed powders. The Mössbauer spectroscopy studies revealed that the as-cast alloy is completely disordered. After annealing at 723 K the long range atomic order appeared. It was stated that the best magnetoelastic properties were exhibited by composites made from ferromagnetic particles obtained from the as-cast alloy. The measured saturation magnetostriction was λs= 70× 10-6 for the bulk alloy and λs=100× 10-6 for composite.
DOI: 10.12693/APhysPolA.114.1537
PACS numbers: 76.80.+y, 75.50.Bb, 75.80.+q, 81.40.Ef, 83.80.Ab