Structure and Magnetic Properties of Boron Doped Fe50+xCu25−xM25(M = Al, Ga) and Fe50+xCo25−xGa

In this paper, we study the effect of B introduction in various Heusler alloys on their structural and magnetic properties. Samples with nominal stoichiometry Fe_50+xCu_25-xGa₂₅, Fe_50+xCu_25-xAl₂₅, and Fe_50+xCo_25-xGa₂₅(x= 0-10) with the addition of excess B up to 12 at% were prepared with Ar arc-melting as base materials. The starting materials were subsequently converted to ribbons using melt-spinning technique with velocity of 35 and 40 m/s, while the other parameters were kept fixed. Basic study of the alloys was conducted with various characterization techniques (energy dispersive X-ray spectrometry, X-ray powder diffraction, and magnetization versus temperature and field). The materials were thermally treated at various temperatures between 873 and 1073 K and the effect on the structure and magnetic properties was studied.