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New Fe-based soft magnetic alloys composed of ultrafine grain structure
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TLDR
In this paper, the magnetic properties of Fe•Si•B•M alloys prepared by annealing amorphous alloys made by the single roller method over their crystallization temperature have been investigated for development of new Fe•based soft magnetic alloys.Abstract:
The magnetic properties of Fe‐Si‐B‐M (M: additives) alloys prepared by annealing amorphous alloys made by the single roller method over their crystallization temperature have been investigated for development of new Fe‐based soft magnetic alloys. Excellent soft magnetic properties were obtained by adding the two elements Cu and Nb to Fe‐Si‐B alloys. It was found that these new alloys, called ‘‘FINEMET,’’ have an ultrafine grain structure composed of bcc Fe solid solution. They are suitable for many kinds of magnetic components such as saturable reactors, choke coils, and transformers, because they have superior soft magnetic properties and a high saturation flux density, and because different types of B‐H hysteresis loops are obtained by magnetic field annealing.read more
Citations
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Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets
TL;DR: In this article, a series of crystallized ribbons of composition Fe/sub 74.5-x/Cu/sub x/Nb/sub 3/Si/sub 13.5/B/sub 9/ (x=0, 1 at) have been annealed between about 500 degrees C and 900 degrees C.
Journal ArticleDOI
Magnetic Properties of Nanostructured Materials
TL;DR: In this paper, a classification of nanostructure morphology according to the mechanism responsible for the magnetic properties is presented, followed by a brief discussion of some promising experimental techniques in synthesis and measurements.
Journal ArticleDOI
Amorphous and nanocrystalline materials for applications as soft magnets
TL;DR: In this paper, the authors summarize the recent developments in the synthesis, structural characterization, properties, and applications of amorphous and nanocrystalline soft magnetic materials, including: kinetics and thermodynamics, structure, microstructure, and intrinsic and extrinsic magnetic properties.
Journal ArticleDOI
Grain structure and magnetism of nanocrystalline ferromagnets
TL;DR: Amorphous ribbons of composition Fe/sub 73.5,Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ have been annealed above their crystallization temperature, which produces a homogeneous, ultrafine grain structure of alpha FeSi with typical grain diameters of 10-20 nm.
Journal ArticleDOI
Size effects in materials due to microstructural and dimensional constraints: a comparative review
TL;DR: In this article, the effects of size on predominantly mechanical properties of materials are reviewed at a first-order level, and important aspects can be understood from the point of view of the interaction of a characteristic length (which may be as diverse as the dislocation radius of curvature at a given stress or the magnetic exchange length) with a size parameter (grain or particle size, or film thickness).
References
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Journal ArticleDOI
Static wall coercive force in ferromagnetic thin films
TL;DR: In this paper, the static wall coercive force of thin ferromagnetic films has been calculated from a model of conservative wall energy, where the spatial dependence of the wall energy γ w is given by the mean value of the local anisotropy energy, averaged over a coupling volume.
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Applications of metallic glasses in the electronics industry
TL;DR: A survey of the major commercial applications of soft magnetic metallic glasses in the field of electronics can be found in this article, where current applications such as magnetic heads for audio and video recorders, magnetic cores with low losses and specifically designed hysteris loops for inductive components in switchedmode power supplies, robust and reliable magnetometers, theft detection devices and sensitive displacement or torque transducers are discussed.
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Low magnetostrictive amorphous Fe-Nb-Si-B alloys
TL;DR: Magnetostriction and magnetic core loss at high frequency up to 50 kHz were investigated together with saturation magnetization, Curie temperature, and crystallization temperature for amorphous (Fe1−xNbx)83Si5B12 alloys as mentioned in this paper.