The inhence of the addition of a few atomic percents of V on the crystallization temperature, and the magnetic properties of amorphous ironboron-silicon alloys were investigated using magnetic measurements and Mossbauer spectroscopy. With an increasing V content, the crystallization temperature increases, but the Curie temperature and the magnetic moment of the Fe atom decrease. We have extracted the local random anisotropy from the coercive field. The crystallization of the amorphous Fe,,V,B,,Si, alloys was studied after vacuum annealing between 600 and 800 K for one hour. An analysis of the Mossbauer spectra along with supporting X-ray diffraction measurements are presented. The crystalline products of these amorphous alloys proceed from bcc-FeSi, t-Fe,B and o-FeB phases.

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We report here our results on magnetization and Mössbauer studies of amorphous Fe80—xVxB12Si8 ribbons with 0 ≤ x ≤ 13.7 in the range 4.2 to 300 K. The temperature variation of magnetization follows Bloch's law. The values of coefficient B, spin wave stiffness constant D, and interatomic distance rijwere calculated from the experimental results. Mössbauer spectroscopy has been used to investigate the structure of the amorphous Fe79.5V0.5B12Si8 alloy annealed at different temperatures. The crystallization proceeds in the following sequence: b.c.c.‐FeSi and t‐Fe2B.