Crystallisation studies in Fe < inf > 37.5 < /inf > Ni < inf > 37.5 < /inf > Cr < inf > 5 < /inf > Mo < inf > 2 < /inf > Si < inf > 10 < /inf > B < inf > 8 < /inf >

Abstract

The distribution of hyperfine fields (HF) is obtained at room temperature for Fe37.5Ni37.5Cr5Mo2Si10B8 annealed at temperatures between 641 K and 744 K. P(H,T) is also derived for samples annealed at 744 K for over 70 hours. Three steps are noted in the evolution of the crystalline phases: (1) separation of ∼ 35% of Fe atoms into environments with low and high HF's, with increase in Tc for the remainder (2) nearly complete separation of the P(H) into these two components on further annealing at a higher temperature and (3) at yet higher annealing temperatures, conversion of the high field phase into one with a lower HF. The observations are tentatively explained in terms of preferential presence of Cr in one of the phases and its subsequent migration into the other phase. © 1986 J.C. Baltzer A.G., Scientific Publishing Company.