Soft magnetic Fe-Co-based amorphous alloys with extremely high saturation magnetization exceeding 1.9 T and low coercivity of 2 A/m

Wang, F.; Inoue, Akihisa; Han, Ye; Zhu, Shengli; Kong, F.L.; Zanaeva, E.N.; Liu, G.D.; Shalaan, E.; Al-Marzouki, F.; Obaid, A. Y.

doi:10.1016/j.jallcom.2017.06.192

Cited by 86 publications

(16 citation statements)

References 25 publications

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“…This material has high saturation magnetisation of 1.9 T and low core losses, with the coercivity field of 4.6 A/m. Similar results are obtained for FeNbB [26] and FeCo–based [27] alloys.…”

Section: Introductionsupporting

confidence: 84%

Low‐loss and lightweight magnetic material for electrical machinery

Ahmadi¹,

Sözer²,

Donahue

et al. 2020

IET Electric Power Applications

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A low‐loss and lightweight core material, with applications in electrical machinery, is made of highly packed and insulated magnetic microwires (MWs). These MWs are aligned in such a way as to guide the flux in the rotor/stator, with the ultimate goal of increasing the efficiency and substantially reducing core losses. Commercial normalFebalnormalNi29normalCo17‐based MWs with a 127 μm diameter and a 33 μm insulation coating are utilised. The magnetic measurements of the fabricated sample demonstrate the high permeability and low core loss in a wide range of frequencies. To prove the utility of this type of material, the authors used it in the rotor core of a prototype 25 W three‐phase synchronous reluctance machine. The core is lighter and the losses are significantly lower than in conventional core materials under the same torque density.

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Section: Introductionsupporting

confidence: 84%

Low‐loss and lightweight magnetic material for electrical machinery

Ahmadi¹,

Sözer²,

Donahue

et al. 2020

IET Electric Power Applications

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“…After annealing, the prepared ribbon shows a coercivity ( H c ) of less than 0.2 Oe and a high saturated magnetic intensity ( B s ) of 1.74 T. Such a B s value is much higher than that of traditional commercially used permalloy (0.6–1 T) or the commercialized Co-based (0.77–1.1 T) and Fe-based (1.5 T) amorphous ribbon. However, in the most recently reported works of Wang et al, an ultrahigh B s value of 1.85 T [ 18 ] and 1.92 T [ 27 ] were achieved in a Fe–Co-based amorphous alloy with similar composition as ours by magnetic field heat treatment. This indicates that the soft magnetic properties of our materials can be further improved by more optimized annealing process.…”

Section: Methodsmentioning

confidence: 55%

Wide Linearity Range and Highly Sensitive MEMS-Based Micro-Fluxgate Sensor with Double-Layer Magnetic Core Made of Fe–Co–B Amorphous Alloy

et al. 2017

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This paper reports a novel micro-fluxgate sensor based on a double-layer magnetic core of a Fe–Co–B-based amorphous ribbon. The melt-spinning technique was carried out to obtain a Fe–Co–B-based amorphous ribbon composite of Fe58.1Co24.9B16Si1, and the obtained amorphous ribbon was then annealed at 595 K for 1 h to benefit soft magnetic properties. The prepared ribbon showed excellent soft magnetic behavior with a high saturated magnetic intensity (Bs) of 1.74 T and a coercivity (Hc) of less than 0.2 Oe. Afterward, a micro-fluxgate sensor based on the prepared amorphous ribbon was fabricated via microelectromechanical systems (MEMS) technology combined with chemical wet etching. The resulting sensor exhibited a sensitivity of 1985 V/T, a wide linearity range of ±1.05 mT, and a perming error below 0.4 μT under optimal operating conditions with an excitation current amplitude of 70 mA at 500 kHz frequency. The minimum magnetic field noise was about 36 pT/Hz1/2 at 1 Hz under the same excitation conditions; a superior resolution of 5 nT was also achieved in the fabricated sensor. To the best of our knowledge, a compact micro-fluxgate sensor with such a high-resolution capability has not been reported elsewhere. The microsensor presented here with such improved characteristics may considerably enhance the development of micro-fluxgate sensors.

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“…Compared with conventional magnetic materials, amorphous alloys exhibit nice magnetic softness and good ductility. [ 86,87 ] Amorphous alloys usually exhibit a low saturated magnetization ( B s ) due to the decrease of the 3d outer‐shell electrons of ferromagnetic elements. [ 88 ]…”

Section: Magnetic Applicationsmentioning

confidence: 99%

Structures and Functional Properties of Amorphous Alloys

et al. 2020

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Amorphous alloys have attracted great attention due to their distinctive properties derived from unique packing structures. Recently, significant advances have been achieved for the understanding of structural characteristics and functional applications of amorphous alloys. Herein, an overview of the state of art of structure studies, accounting for the characteristics of amorphous alloys, are presented, and recent progresses in the functional applications of amorphous alloys are highlighted. The various structural models for the short‐range order, medium‐range order, and long‐range topological order for amorphous alloys are introduced. The functional applications in electrochemistry, mechanism, magnetism, optics, and biomedical engineering are presented in detail. The fundamental understanding of the correlations between structures and properties in amorphous alloys is discussed.

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Soft magnetic Fe-Co-based amorphous alloys with extremely high saturation magnetization exceeding 1.9 T and low coercivity of 2 A/m

Cited by 86 publications

References 25 publications

Low‐loss and lightweight magnetic material for electrical machinery

Low‐loss and lightweight magnetic material for electrical machinery

Wide Linearity Range and Highly Sensitive MEMS-Based Micro-Fluxgate Sensor with Double-Layer Magnetic Core Made of Fe–Co–B Amorphous Alloy

Structures and Functional Properties of Amorphous Alloys

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