Production and characterization of 〈1 0 0〉 textured magnetostrictive Fe–Ga rods

• Published in: Journal of alloys and compounds 2010-04, Vol.494 (1), p.420-425
• Main Authors: Hatchard, T.D., George, A.E., Farrell, S.P., Steinitz, M.O., Adams, C.P., Cormier, M., Dunlap, R.A.
• Format: Article
• Language: English
• Subjects: Approximation; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Crystallographic texture; Crystallography; Exact sciences and technology; Ferromagnetic alloys; Fe–Ga; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Magnetostriction; Magnetostrictive materials; Materials science; Other heat and thermomechanical treatments; Physics; Rods; Saturation; Suction extraction; Surface layer; Texture; Treatment of materials and its effects on microstructure and properties; X-ray diffraction; Zone melting
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2010.01.066

Magnetostrictive rods of the approximate composition Fe 82Ga 18 have been produced with a preferred 〈1 0 0〉 axial crystallographic texture. Randomly oriented polycrystalline rods were cast by a suction extraction technique and a preferred 〈1 0 0〉 axial crystallographic texture was introduced through zone melting. Capacitance dilatometery showed that the as-cast rods and oriented zone-melted rods had saturation magnetostrictions of approximately 50 ppm and 100 ppm, respectively. Subsequent annealing of zone-melted rods resulted in a re-orientation of the axial crystallographic texture to a preferential 〈1 1 1〉 direction along with a corresponding reduction of the saturation magnetostriction.