Magnetic properties of nanocrystalline FeMCuNbSiB alloys (M: Co, Ni)

Yoshizawa, Y.; Fujii, Satoshi; Ping, D. H.; Ohnuma, Masato; Hono, K.

doi:10.1016/s1359-6462(02)00611-5

Cited by 114 publications

(53 citation statements)

References 17 publications

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“…7,8 K U in Fe,Co-based soft magnetic amorphous and amorphous/nanocrystalline "nanocomposite" alloy systems has been reported and discussed in a number of previous works. [5][6][7][8][9][10][11][12] Amorphous ribbons were synthesized by arc-melting and single roller wheel melt spinning. Toroidal wound cores were annealed in flowing N 2 for 1 h with a 2 T transverse field.…”

mentioning

confidence: 99%

Temperature stability of field induced anisotropy in soft ferromagnetic Fe,Co-based amorphous and nanocomposite ribbons

Ohodnicki

Laughlin

McHenry

et al. 2009

Journal of Applied Physics

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The temperature stability of field induced uniaxial anisotropy ͑K U ͒ was investigated by thermomagnetic treatments of ͑Co 1−x Fe x ͒ 89 Zr 7 B 4 amorphous ribbons after field annealing below and above the crystallization temperature. We conclude: ͑1͒ Field annealing treatments are necessary to properly investigate the temperature stability of K U , ͑2͒ K U of field crystallized alloys exhibit improved temperature stability relative to alloys remaining amorphous after field annealing, and ͑3͒ larger K U is obtained for field crystallization treatments as compared to zero-field crystallization followed by field reannealing. Field crystallization may be required for elevated temperature applications when field induced anisotropy is critical for performance.

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confidence: 99%

Temperature stability of field induced anisotropy in soft ferromagnetic Fe,Co-based amorphous and nanocomposite ribbons

Ohodnicki

Laughlin

McHenry

et al. 2009

Journal of Applied Physics

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“…Magnetic field annealing is commercially used to induce magnetic anisotropy; however, it is necessary to substitute Co for Fe to obtain an anisotropy field that is larger than 1000 A/m by this method. 3,4 In contrast, the anisotropy field that is induced by stress annealing can exhibit larger values than 1000 A/m without substituting Co for Fe. The stress-induced anisotropy of amorphous alloys annealed below crystallization temperatures (300-400°C) has been studied widely.…”

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confidence: 99%

“…Since the report by Yoshizawa et al 1 in 1988, a number of investigations on nanocrystalline soft magnetic alloys have been carried out to optimize the properties that are suitable for specific applications leading to increase in saturation flux density, Curie temperature, and in-plane magnetic anisotropy. [2][3][4] The in-plane magnetic anisotropy is especially important for applications in high-frequency regions, because large magnetic anisotropy increases the magnetic resonance frequency and produces a flat permeability-frequency ͑-f͒ response. Magnetic field annealing is commercially used to induce magnetic anisotropy; however, it is necessary to substitute Co for Fe to obtain an anisotropy field that is larger than 1000 A/m by this method.…”

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confidence: 99%

Direct evidence for structural origin of stress-induced magnetic anisotropy in Fe–Si–B–Nb–Cu nanocrystalline alloys

Ohnuma

Hono

Yanai

et al. 2003

Applied Physics Letters

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The structural origin of magnetic anisotropy in Fe-Si-B-Nb-Cu alloys annealed under a tensile stress of 200 MPa is studied by transmission x-ray diffraction. The diffraction peak of the ͑310͒ plane, whose normal vector is parallel to the tensile direction ͑ribbon direction͒, appears at a lower angle than the one perpendicular to it by about 0.1°. This indicates that the spacing of the ͑310͒ plane normal to the tensile direction is about 0.2% larger than the one parallel to it. This is direct evidence for the structural origin of the stress-induced magnetic anisotropy of nanocrystalline soft magnetic alloys.

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“…It has been seen over the years that the induced anisotropy in soft nanocrystalline alloys can be altered by partial substitution of Fe content in FINEMET type alloys with Co or Ni [52] [53] of which the relative permeability can be reduced from about 20000 to 2500 [54] samples during primary crystallization as studied by Hono et al [13].…”

Section: The Origin Of Magnetic Anisotropymentioning

confidence: 99%

Research Progress of Stress-Induced Magnetic Anisotropy in Fe-Based Amorphous and Nanocrystalline Alloys

Nutor¹,

Fan²,

Ren³

et al. 2017

JEMAA

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Since it was discovered that stress annealing induced larger anisotropies compared to other annealing methods in amorphous and nanocrystalline alloys, there has been a lot of research done to explain this phenomenon. This has led to many suggestions about the origin of this stress-induced magnetic anisotropy, but till now the origin is explained with two competing models: the magnetoelastic effect model and the diatomic pair ordering model. In spite of these theories, the origin of the stress-induced anisotropy is still under discussion because direct observation of structural anisotropy is still lacking. In this paper, we have reviewed some of the characterization techniques which have been used to discuss the origin of stress-induced magnetic anisotropy and the progress which has been made thus far in unifying all the contrasting views which has been suggested to be the origin of the stress-induced anisotropy in FINEMET alloys.

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Magnetic properties of nanocrystalline FeMCuNbSiB alloys (M: Co, Ni)

Cited by 114 publications

References 17 publications

Temperature stability of field induced anisotropy in soft ferromagnetic Fe,Co-based amorphous and nanocomposite ribbons

Temperature stability of field induced anisotropy in soft ferromagnetic Fe,Co-based amorphous and nanocomposite ribbons

Direct evidence for structural origin of stress-induced magnetic anisotropy in Fe–Si–B–Nb–Cu nanocrystalline alloys

Research Progress of Stress-Induced Magnetic Anisotropy in Fe-Based Amorphous and Nanocrystalline Alloys

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