Development of Nanocrystalline Soft Magnetic Alloys "Nanoperm" with High Saturation Magnetization.

Soft magnetic properties and giant magneto-impedance effect of Fe-Zr-Nb-B-Cu ribbons

“…The excellent soft magnetic properties of lower magnetostriction and higher permeability along with the circular or transverse anisotropy are the main premise to the GMI response. Recently, Makino et al [10] found that the coexistence of Zr and Nb in the Fe-M-B based alloys allows access to the realization of forming nearly zero magnetostriction materials, leading to obvious improvement of the soft magnetic properties. This development of the new soft magnetic nanocrystalline alloys with the excellent characteristics of high saturation magnetic induction B s above 1.5 T and effective permeability µ above 10 5 predicts a comprehensive application prospect in the fields of power transformers, magnetic heads, magnetic sensors and so on.…”

The relationship between the crystallization process and the soft magnetic properties of nanocrystalline Fe–M–B–Cu (M=Zr, Nb) alloy

“…[1][2][3][4][5][6][7] It has been found that Fe based alloys containing a small amount of Cu such as Fe-Si-B-Nb-Cu 1,2 and Fe-Nb-Zr-B-Cu 4-7 exhibit high effective permeability e above 1ϫ10 5 at 1 kHz. In particular, the nanocrystalline Fe rich Fe-Nb-Zr-B-Cu alloys are attractive because the alloys exhibit high e of 1.0ϫ10 5 -1.6ϫ10 5 at 1 kHz and a high saturation magnetic flux density B s of 1.5-1.6 T, simultaneously.…”

“…In particular, the nanocrystalline Fe rich Fe-Nb-Zr-B-Cu alloys are attractive because the alloys exhibit high e of 1.0ϫ10 5 -1.6ϫ10 5 at 1 kHz and a high saturation magnetic flux density B s of 1.5-1.6 T, simultaneously. [4][5][6][7] In this work, we have investigated the relationship between the crystallization process ͑annealing time and temperature͒ and the soft magnetic properties of a nanocrystalline Fe 84 Nb 3.5 Zr 3.5 B 8 Cu 1 alloy by comparison with that of the Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 alloy.…”