Structure and magnetostriction of melt-spun Fe_(81-x)Ni_xGa_(19)(x=0,5,10,15,20,25) alloys

摘要

Fe_(81-x)Ni_xGa_(19)(with x ranging from 0-25 at.% Ni) ribbons were made by melt spinning method. We have studied the structural (phases, texturing, and lattice parameter), magnetic (saturation magnetization and saturation magnetostriction) properties of these ribbons. The main results are as follows: (i) For x≤10, all the ribbons are A_2 single phase; for x=15, the ribbon is of A_2+L1_2+DO_3+E2_1 phase; for x=20, the ribbon is of A_2+L1_2+DO_3+B_2 phase; for x=25, only A_2 and L1_2 phases exist. (ii) For x=5 and 15, an obvious (211) texture was detected, whereas other ribbons are (110) textured, no (100) texture was tested. (iii) (110) texture in our ribbons brought low saturation magnetic field (Hs) and high saturation magnetostrction (λ_s). (iv) E2_1 phase played a positive role in the magnetostricion of FeNiGa ribbons.