Copper-free nanocrystalline soft magnetic materials with high saturation magnetization comparable to that of Si steel

K. Suzuki, R. Parsons, B. Zang, K. Onodera, Hidefumi Kishimoto, Takahiro A Kato

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The effect of rapid annealing on the structural and magnetic properties of melt-spun Fe-B based alloys has been investigated. The grain size of a Fe85B13Ni2 alloy after primary crystallization is reduced significantly by rapid annealing, and a low coercivity of 4.6 A/m and a high saturation magnetization of 1.90 T are obtained. This saturation magnetization is comparable to those of Si steels (1.8-2 T). The core losses of nanocrystalline Fe85B13Ni2 are lower by 60%-80% as compared with those of commercial Si steels. Rapid annealing is found to be effective in realizing a magnetically soft nanostructure without Cu addition, leading to an exceptionally low content of nonmagnetic additives (2.8 wt. %) and thus a high saturation magnetization in the nanostructure.

Original languageEnglish
Article number012407
Number of pages4
JournalApplied Physics Letters
Volume110
Issue number1
DOIs
Publication statusPublished - 2 Jan 2017

Cite this

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title = "Copper-free nanocrystalline soft magnetic materials with high saturation magnetization comparable to that of Si steel",
abstract = "The effect of rapid annealing on the structural and magnetic properties of melt-spun Fe-B based alloys has been investigated. The grain size of a Fe85B13Ni2 alloy after primary crystallization is reduced significantly by rapid annealing, and a low coercivity of 4.6 A/m and a high saturation magnetization of 1.90 T are obtained. This saturation magnetization is comparable to those of Si steels (1.8-2 T). The core losses of nanocrystalline Fe85B13Ni2 are lower by 60{\%}-80{\%} as compared with those of commercial Si steels. Rapid annealing is found to be effective in realizing a magnetically soft nanostructure without Cu addition, leading to an exceptionally low content of nonmagnetic additives (2.8 wt. {\%}) and thus a high saturation magnetization in the nanostructure.",
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Copper-free nanocrystalline soft magnetic materials with high saturation magnetization comparable to that of Si steel. / Suzuki, K.; Parsons, R.; Zang, B.; Onodera, K.; Kishimoto, Hidefumi; Kato, Takahiro A.

In: Applied Physics Letters, Vol. 110, No. 1, 012407, 02.01.2017.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Copper-free nanocrystalline soft magnetic materials with high saturation magnetization comparable to that of Si steel

AU - Suzuki, K.

AU - Parsons, R.

AU - Zang, B.

AU - Onodera, K.

AU - Kishimoto, Hidefumi

AU - Kato, Takahiro A

PY - 2017/1/2

Y1 - 2017/1/2

N2 - The effect of rapid annealing on the structural and magnetic properties of melt-spun Fe-B based alloys has been investigated. The grain size of a Fe85B13Ni2 alloy after primary crystallization is reduced significantly by rapid annealing, and a low coercivity of 4.6 A/m and a high saturation magnetization of 1.90 T are obtained. This saturation magnetization is comparable to those of Si steels (1.8-2 T). The core losses of nanocrystalline Fe85B13Ni2 are lower by 60%-80% as compared with those of commercial Si steels. Rapid annealing is found to be effective in realizing a magnetically soft nanostructure without Cu addition, leading to an exceptionally low content of nonmagnetic additives (2.8 wt. %) and thus a high saturation magnetization in the nanostructure.

AB - The effect of rapid annealing on the structural and magnetic properties of melt-spun Fe-B based alloys has been investigated. The grain size of a Fe85B13Ni2 alloy after primary crystallization is reduced significantly by rapid annealing, and a low coercivity of 4.6 A/m and a high saturation magnetization of 1.90 T are obtained. This saturation magnetization is comparable to those of Si steels (1.8-2 T). The core losses of nanocrystalline Fe85B13Ni2 are lower by 60%-80% as compared with those of commercial Si steels. Rapid annealing is found to be effective in realizing a magnetically soft nanostructure without Cu addition, leading to an exceptionally low content of nonmagnetic additives (2.8 wt. %) and thus a high saturation magnetization in the nanostructure.

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