Soft magnetic properties and high frequency characteristics of FeM (M = B, Hf, Zr) and pure Fe films fabricated by oblique deposition

Yang, Chengcheng; Zhang, Chao; Wang, Fenglong; Zhao, Zhong; Jiang, Changjun; Xue, Desheng

doi:10.1007/s00339-015-9295-9

Cited by 13 publications

(3 citation statements)

References 40 publications

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“…For Fe–Si magnetic alloys, their magnetic field intensities mainly depend on the rotation of magnetic moment, and λ‐fiber textures, such as the {001}<001> and {001}<011> components, are endowed with excellent soft magnetic properties, whereas γ‐fiber recrystallization textures are considered to the unfavorable textures because the <111> direction is hard to be magnetized in electrical steels . In contrast to Fe–3.0 wt%Si electrical steel, the magnetic properties of Fe–6.9 wt%Si steel with high silicon content are more dependent on texture evolution in the production procedure; therefore, attention has been accorded to the suppressing {111} texture as well as the enhancing {001} texture .…”

Section: Resultsmentioning

confidence: 99%

Investigation of {001} Texture Reservation and Grain Boundary Character Distribution of Fe–6.9 wt%Si Magnetic Material by Warm–Cold Rolling

Cai

Huang

2019

steel research int.

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In this work, the texture evolution, grain boundary character distribution, and magnetic properties of nonoriented Fe–6.9 wt%Si electrical steel are studied. It is found that Fe–6.9 wt%Si steel obtains the higher magnetic inductions based on the heredity of {001} orientation texture during warm rolling, whereas the change in γ‐fiber recrystallization texture is attributed to a significant increase in the frequency of coincidence site lattice grain boundaries after annealing. Meanwhile, the increased recrystallization nuclei in the shear bands lead to the improvement of recrystallization nucleation rate and the decline of grain size because of the accumulation of internal stored energy. Finally, the values of magnetic inductions (B8, B50) and iron losses (P10/50, P10/400) decrease with increasing warm rolling temperatures.

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Section: Resultsmentioning

confidence: 99%

Investigation of {001} Texture Reservation and Grain Boundary Character Distribution of Fe–6.9 wt%Si Magnetic Material by Warm–Cold Rolling

Cai

Huang

2019

steel research int.

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“…The precession of all magnetizations can be treated as one macro spin, and behaves coherently and homogeneously. That is the reason why the magnetic thin films for EM noise suppression were frequently annealed with a magnetic field to induce an uniaxial anisotropy, and their permeability spectra were analyzed with one LLG type natural resonance [37][38][39].…”

Section: Effect Of the Remanent States (Memory Effect)mentioning

confidence: 99%

Intrinsic high frequency permeability of magnetic nanocomposites: uncertainty principle

Han

2024

Nanotechnology

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The intrinsic high frequency permeability spectra of ferromagnetic conductive nanocomposites containing different volume fractions of nanoscale iron and cobalt have been simulated. A law is proposed to explain the simulated results by assuming that there are plenty of LLG (Landau-Lifshitz-Gilbert) type natural resonances contributing to the intrinsic permeability spectra. The results clearly show that the spectra strongly depend on the distribution of local effective magnetic field, the interaction between the magnetic particles, the inhomogeneous damping constant of LLG precession, and the initial equilibrium states. Especially, the effect of particles shape distribution in each sampling on the local effective magnetic field. In view of this fact: it is absolutely impossible to have the same effect from these factors when someone prepares several measurement samples, an uncertainty principle is believed to hold for measuring the intrinsic permeability of an electromagnetic (EM) composite. Therefore, this law tells us that it should be cautious when comparing or evaluating the EM properties of composites (for instance, EM wave absorbing composites). Memory effect can be used to restore the intrinsic high frequency permeability for a specific defunct composite sample.

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“…For reduced interparticle eddy current loss, dielectric shells surrounding nanoparticles are also required to avoid electric conduction between neighboring nanoparticles. Insulating materials such as oxides (Al 2 O 3 , SiO 2 , ZnO), ,, nitrides (SiN, FeN x ), , carbon and polymers (PPy) have been used as the dielectric shells surrounding metallic magnetic nanoparticles, with thickness above several nanometers. The interparticle insulation can be achieved in these cases but usually at the sacrifice of saturation magnetization, due to magnetic dilution caused by excessive nonmagnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

Bai

Jin

Yan

2019

ACS Appl. Nano Mater.

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Low-dimensional soft magnetic materials are technologically important for miniaturization of magnetic devices. It is, however, challenging to maintain ferromagnetic response in nanosized magnetic material. In this work, ultrafine FeCo nanoparticles have been prepared by reactive pulsed laser deposition, which can be exchange coupled through ultrathin dielectric shells, even though their diameters are far below the superparamagnetic blocking limit. This unique core/shell structure guarantees ferromagnetic coupling and insulation of neighboring magnetic nanoparticles simultaneously. The nanoparticle film exhibits large saturation magnetization of 1.13 T, high electrical resistivity of 4200 μΩ·cm, maximum permeability of 120, a cutoff frequency of 1.7 GHz, and it is a promising material for microwave application.

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Soft magnetic properties and high frequency characteristics of FeM (M = B, Hf, Zr) and pure Fe films fabricated by oblique deposition

Cited by 13 publications

References 40 publications

Investigation of {001} Texture Reservation and Grain Boundary Character Distribution of Fe–6.9 wt%Si Magnetic Material by Warm–Cold Rolling

Investigation of {001} Texture Reservation and Grain Boundary Character Distribution of Fe–6.9 wt%Si Magnetic Material by Warm–Cold Rolling

Intrinsic high frequency permeability of magnetic nanocomposites: uncertainty principle

Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

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