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In this paper (1) the development of a stress dependent tetragonal (uniaxial to lowest order) anisotropy in the Galfenol (iron-gallium) alloys by stress annealing is described (2) their magnetic, magnetostrictive and anisotropic properties by fitting magnetostriction and magnetoelastic data to a simple magnetization rotation model are given, and (3) the amount of built-in stress by stress annealing...
This paper focuses on the preparation and characterization of 2 new Fe-Ga-based alloys: (i) 3-D shaped Fe100-x(Ga,Al)x polycrystalline magnetostrictive alloys, and (ii) Fe100-x(Ga,Al)x composite materials, consisting of nano-and micropowders of active material embedded into a polymer matrix. Thin plates have been prepared by Cu mould casting technique, and magnetostriction has been measured by the...
Magnetomechanical coupling factor, piezomagnetic d-constant and magnetic permeability are reported as a function of magnetic field and applied stress for stress annealed Fe-Ga and Fe-Al alloys. Magnetic field dependences of the samples were measured as a function of the intrinsic saturation flux density (Js), lowest order cubic anisotropy coefficient (Kcubic), uniaxial anisotropy lowest order coefficient...
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