Magnetic field and low frequency dependence of impedance reactive component in nanocrystalline Fe73.5Cu1Nb3Si16.5B6 ribbons

Tejedor, M.; Hernando, B.; Sánchez, Marı́a Luisa Fernández; Prida, V.M.

doi:10.1016/s0304-8853(99)00206-1

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…λ s of FZBNC may decrease from a large positive value to a negative one passing through zero with increasing annealing temperature and the small negative magnetostriction that is closely related to a significant MI effect may be obtained in the specimen annealed at 575 • C. Moreover, after suitable thermal treatment, a relatively small effective anisotropy develops in the FZBNC ribbons, which corresponds to a large MI effect. Owing to the complex magnetic response of the domain configuration or transversal magnetic permeability [22,[44][45][46], however, the emergence of effective anisotropy is difficult to explain in detail. Furthermore, the dimensions of FZBNC must be considered.…”

Section: Effectmentioning

confidence: 99%

Nanocrystallization behaviour and optimized magnetoimpedance effect in FeZrBNbCu alloys

Zhang¹,

Han²,

Xiao³

et al. 2007

J. Phys. D: Appl. Phys.

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The work aims at understanding the changes in magnetic properties and the magnetoimpedance (MI) effect for the Fe 84.5 Zr 4 B 8.5 Nb 2 Cu 1 (FZBNC) nanocrystalline alloys with the annealing temperature (T a) from the microstructure point of view. The as-quenched FZBNC ribbons were annealed in a vacuum condition at selected temperatures for 20 min. The microstructures of the specimens were examined by the x-ray diffraction technique. The bcc α-Fe phase is identified from the XRD patterns. The mean grain size of the α-Fe phase (D 1) at different annealing temperatures (T a) was estimated using Scherrer's equation. The results show that D 1 for the sample annealed at 575 • C is about 20 nm, which is the smallest value among all the samples. Measurements on the MI effect reveal that the FZBNC ribbon annealed at 575 • C exhibits the most drastic MI ratio of 756% at 600 kHz accompanied by the field sensitivity of 108% Oe −1 , while a large MI effect is not observed in the sample annealed at other temperatures. The origin of the excellent MI effect is investigated in this paper.

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Section: Effectmentioning

confidence: 99%