Magnetic resonances and microwave permeability in thin Fe films on flexible polymer substrates

Shiryaev, Artem O.; Rozanov, Konstantin N.; Vyzulin, S. A.; Kevraletin, A. L.; Syr’ev, N. E.; Vyzulin, E.S.; Lähderanta, E.; Maklakov, Sergey S.; Granovsky, A. B.

doi:10.1016/j.jmmm.2018.04.059

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…This can be explained in terms of magnetic flux shunting. The thickness of the ferromagnetic shield with high magnetic permeability is the main parameter for the total flux conduction [25]. The minimum value of the shielding effectiveness was detected for the sample with the minimum thickness of the partial ferromagnetic layer, 5 μm, and maximum numbers of the layers, i.e.…”

Section: Magnetostatic Multilayered Shields Based On Ni 80 Fe 20 Filmsmentioning

confidence: 97%

Сrystal Structure and Functional Properties of Ni-Fe Films

Труханов¹

2019

Engineering Magnetic, Dielectric and Microwave Properties of Ceramics and Alloys

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Ni 1-x Fe x alloys were produced in film form via electrodeposition. These samples were produced to study magnetic characteristics as a function of chemical composition Ni 1-x Fe x with x = 0; 0.20 and 0.50 and film thickness for the Ni 80 Fe 20 system. The chemical composition corresponds to that established before synthesis. Deviation from the calculated stoichiometry is less than 0.7 at. %. The main magnetic parameters of obtained films such as permeability, coercivity and induction were investigated as a function of Fe concentration. The permeability and coercivity as a function of the thickness for the Ni 80 Fe 20 films were measured. The field dependence of initial permeability for these films was also measured in the thickness range from 100 nm to 80 µm.

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Section: Magnetostatic Multilayered Shields Based On Ni 80 Fe 20 Filmsmentioning

confidence: 97%

Сrystal Structure and Functional Properties of Ni-Fe Films

Труханов¹

2019

Engineering Magnetic, Dielectric and Microwave Properties of Ceramics and Alloys

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“…The standard ferromagnetic resonance (FMR) technique [10][11][12] makes it possible to find the magnetic characteristics of materials, but the observed peaks may not be interpreted. Moreover, extraneous resonances can be observed in addition to FMR, the appearance of which is difficult to explain [13].…”

Section: Introductionmentioning

confidence: 99%

Splitting of the Magnetic Loss Peak of Composites under External Magnetic Field

Shiryaev

Rozanov

Naboko

et al. 2021

Physics

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Composite materials filled with ferromagnetic inclusions are useful in the development of various microwave devices. The performance of such devices is determined both by material properties (such as the saturation magnetization and the permeability) and by the demagnetization effects. The paper is devoted to the study of the demagnetization effect on the permeability measurements of composites under external magnetic bias. The microwave permeability of composites filled with flake sendust (Fe-Si-Al alloy) particles is measured as a function of frequency and the external magnetic field. The measurements are carried out by the Nicolson–Ross–Weir technique in a 7/3 coaxial line in the frequency range of 0.1 to 20 GHz by a vector network analyzer. It is found that the magnetic loss peak is split under external fields of more than 1.5 kOe. The main aim of this paper is to study the causes of this splitting and to interpret the observed magnetic loss peaks. To study this effect, the samples of various thicknesses and the samples with isotropic and anisotropic orientations of particles are measured. The particles in the anisotropic samples are oriented by a strong uniform magnetic field. At a small fraction of inclusions, the permanent magnetic field is demagnetized on the individual particles rather than the whole sample. The splitting of the magnetic loss peak of the isotropic sample is caused by different orientations of particles in the sample. At a high fraction of inclusions, the permanent magnetic field is demagnetized on the whole sample and the magnetic loss peak of the isotropic sample is not split. The saturation magnetization of the material is found by measurements under the external magnetic field of the anisotropic sample.

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