Magnetic and Mössbauer study of Fe-V-B-Si amorphous metallic ribbons

Abstract

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.

Effect of Tm substitution on the magnetic properties and local magnetic anisotropy of amorphous Fe80−xTmxB20 ribbons

“…It is clear that the increase in the Tm content leads to a decrease of the hyperfine field values. Many similarities exist between the results obtained on different amorphous alloys: Fe 80−x Tm x B 20 , Fe 80−x V x B 12 Si 8 and Fe 80−x R x B 20 (R = Er, Ho; 0 ≤ x ≤ 16) [5,25,26], as previously reported.…”

“…The influence of addition of various magnetic and/or non-magnetic atoms on the magnetic and transport properties has been well documented [1][2][3][4][5]. In particular Fe-based alloys produced by melt spinning techniques hold promise for several applications such as magnetic shields, power and electronic transformers and recording heads.…”