Excellent soft magnetic Fe-Co-B-based amorphous alloys with extremely high saturation magnetization above 1.85 T and low coercivity below 3 A/m

Wang, F.; Inoue, Akihisa; Han, Yanqing; Kong, F.L.; Zhu, Shengli; Shalaan, E.; Al-Marzouki, F.; Obaid, A. Y.

doi:10.1016/j.jallcom.2017.03.341

Cited by 85 publications

(19 citation statements)

References 35 publications

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“…Soft magnetic materials are used in various types of electrical devices to store energy and convert or generate electricity [1]. Compared to the conventional soft magnetic materials, nanocrystalline alloys show exceptional magnetic behaviors such as higher saturation magnetic induction, lower coercivity, higher magnetic permeability, and enhanced core loss performance at high frequencies [2][3][4]. These types of alloys pave the way for reaching smaller, lighter, and more efficient electrical components.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

Zhang

Sohrabi

et al. 2020

Metals

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Applying tensile stresses on straight soft magnetic ribbons before core fabrication is a routine method of inducing magnetic anisotropy, while methods of stress annealing of ribbons after core winding are seldom explored. In this study, we utilize a novel approach to induce magnetic anisotropy by applying radial stresses on tape-wound cores of Fe73.5Si13.5B9Cu3Nb1 (at. %) ribbon during crystallization heat treatment. The results show that while stress annealing does not change the structural characteristics of annealed samples, the magnetic anisotropies induced can increase to values ~3–5 times larger than the sample annealed in the absence of external stress. This increase in magnetic anisotropy energy is associated with ~25–50% decrease of magnetic inductance in the treated cores. These results suggest that the magnetic properties of nanocrystalline soft magnetic alloys can be effectively tuned by applying radial stresses.

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Section: Introductionmentioning

confidence: 99%

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

Zhang

Sohrabi

et al. 2020

Metals

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“…The iron-based bulk amorphous alloys are a particularly interesting group of functional materials [8,9]. Materials of this type are characterized by so-called softmagnetic properties; i.e., a low coercive field value and high saturation of magnetisation [10][11][12][13][14][15]. This type of alloy can be used in the electronics and power industries, for example, as the core material of low-loss transformers.…”

Section: Introductionmentioning

confidence: 99%

The Total Core Losses in Bulk Amorphous Rods of Fe₆₀Co₁₀Y_8-xNi_2+xB₂₀ Alloys (Where x=0, 1)

Nabiałek

Jeż

et al. 2020

Acta Phys. Pol. A

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As part of this work, structural investigations were carried out on rapidly-cooled alloys with the following chemical compositions: Fe60Co10Y8−xNi2+xB20 (where x = 0, 1). X-ray diffraction studies confirmed that the tested materials have an amorphous structure. This structure is characterized by absence of long-range atomic order, in the contexts of angularity and periodicity. Therefore, these materials should exhibit different magnetic properties, compared with those of their crystalline counterparts. In the electrical power and electronics industries, there is a constant demand for materials with better and better properties. The main considerations of applicability are economics and environmental protection. The deciding parameter, determining the usefulness of ferromagnetic alloys in electrotechnical devices and considering economics and ecology, is their low losses on remagnetization. For the produced alloys, described in this paper, a series of loss tests for remagnetization at different frequencies was carried out. The losses for remagnetization -pertaining to the hysteresis loop -and additional losses were determined.

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“…Amorphous materials are characterised by an absence of long-range atomic order [2][3][4], which results in their completely different properties. Amorphous alloys based on Fe and Co are characterised by promising soft magnetic properties (e.g., low coercive field value and high saturation magnetisation value) [5][6][7][8]. The absence of crystalline structure makes these materials extremely easy to re-magnetise, which results in their relatively low losses [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The Magnetisation Process of Bulk Amorphous Alloys: Fe36+xCo36−xY8B20, Where: x = 0, 3, 7, or 12

et al. 2020

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Amorphous Fe- and Co-based alloys possess so-called soft magnetic properties. Due to the high sensitivity of the magnetisation vector to any inhomogeneities occurring in these alloys, it is possible to assess indirectly structural defects. This paper presents the results of research on the structure and magnetic properties of bulk amorphous alloys with a high content of Fe and Co. The magnetic properties of the produced alloys were tested using a Faraday magnetic balance and a vibrating sample magnetometer (VSM). Analysis of the magnetisation process in the region known as the approach to ferromagnetic saturation was carried out in accordance with Kronmüller’s theorem. Magnetisation in magnetic fields of greater than the effective anisotropy field (Holstein-Primakoff para-process) was also studied. For the studied alloys, it was found that an increase in Fe content causesan increase in saturation magnetisation, and decreases in the values of the coercive field and thespin-wave stiffness parameter, Dspf. A relationship was observed between the width of the amorphous halo and the value of the coercive field. However, no significant links were found between either the presence of structural defects and the properties of these materials, or between the Co content and the value of the coercive field.

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Excellent soft magnetic Fe-Co-B-based amorphous alloys with extremely high saturation magnetization above 1.85 T and low coercivity below 3 A/m

Cited by 85 publications

References 35 publications

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

The Total Core Losses in Bulk Amorphous Rods of Fe₆₀Co₁₀Y_8-xNi_2+xB₂₀ Alloys (Where x=0, 1)

The Magnetisation Process of Bulk Amorphous Alloys: Fe36+xCo36−xY8B20, Where: x = 0, 3, 7, or 12

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Excellent soft magnetic Fe-Co-B-based amorphous alloys with extremely high saturation magnetization above 1.85 T and low coercivity below 3 A/m

Cited by 85 publications

References 35 publications

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

Magnetic Properties in Finemet-Type Soft Magnetic Toroidal Cores Annealed under Radial Stresses

The Total Core Losses in Bulk Amorphous Rods of Fe60Co10Y8-xNi2+xB20 Alloys (Where x=0, 1)

The Magnetisation Process of Bulk Amorphous Alloys: Fe36+xCo36−xY8B20, Where: x = 0, 3, 7, or 12

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The Total Core Losses in Bulk Amorphous Rods of Fe₆₀Co₁₀Y_8-xNi_2+xB₂₀ Alloys (Where x=0, 1)