Magnetocrystalline anisotropy and magnetostriction in ordered and disordered Fe–Ga single crystals

Abstract

Abstract On the basis of our new equilibrium phase diagram, Fe 1− x Ga x ( x =0.24–0.25) single crystals with the A2, B2 and D0 3 structures have been prepared in order to investigate the magnetocrystalline anisotropies and magnetostrictions. The [1 1 0] direction was identified as a hard axis and the anisotropy coefficients were | K 2 |> K 1 >0, 0> K 2 in the A2 and B2 structures. Lowering the symmetry of the atomic arrangement, the magnetostriction of the [1 0 0] direction becomes larger. These results agree with qualitatively the theoretical calculations.