Effect of Co substitution for Ni on the microstructure and magnetic properties of (Fe, Ni)-based amorphous alloys produced by melt spinning

Suliţanu, N.; Brinza, Florin; Tufescu, Florin Mihai

doi:10.1016/j.jnoncrysol.2005.01.003

Cited by 4 publications

(1 citation statement)

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“…Since the large MI effect has been observed in amorphous ferromagnets and not in ordinary crystalline alloys, the role of large permeability as a result of very small magnetic anisotropy inherent to amorphous materials is strongly suggested. During the rapid quenching process, variation in the super-cooling rate across the whole section of the ribbon results in internal stress and a difference in microstructure over the ribbon cross-section [17,28]. Co-based amorphous alloys with λ s > 0 or λ s < 0 are observed in a maze domain structure, which indicates the existence of tensile stress regions for alloys with positive magnetostriction and compressive stress regions for alloys with negative magnetostriction.…”

Section: Discussionmentioning

confidence: 99%

Influence of Fe on magnetoimpedance effect of Co_72−xFe_xZr₈B₂₀alloys

Zhang¹,

Lv²,

Liu³

et al. 2006

J. Phys. D: Appl. Phys.

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The magnetoimpedance (MI) of as-spun amorphous Co72−xFexZr8B20 (CFZB, x = 0, 2, 5, 7 at.%) alloys has been measured at a frequency ranging from 310 to 1110 kHz and a dc magnetic field between 0 to 70 Oe. The maximum MI ratio ΔZ/Z(%)max of the CFZB alloys increases with increasing frequency for each sample and decreases with the increment of Fe content at any frequency. The most drastic MI effect, the maximum value of about 90% at 1110 kHz accompanied by the field sensitivity of 18% Oe−1, is observed in CFZB without Fe. Magnetic measurements reveal that coercivity of CFZB decreases first and then increases with increasing Fe content, and the minimum value of about 1.6 Oe is obtained in the sample with x = 2 at.%. The permeability of CFZB was evaluated from quasi-static hysteresis loops, indicating that the Fe-free CFZB is of the largest permeability. Measurements on electrical resistivity suggest that the Fe-free sample possesses smaller resistivity while the sample with x = 7 at.% has a much larger resistivity compared with CFZB with 2 and 5 at.% Fe. The correlation between MI effect and magnetic properties together with electrical resistivity for the CFZB alloy is discussed in this paper.

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Section: Discussionmentioning

confidence: 99%