Automatic measurement of complex tensorial permeability of magnetized materials in a wide microwave frequency range

Quéffélec, Patrick; Mallegol, Stéphane; LeFloc'h, M.

doi:10.1109/tmtt.2002.802325

Cited by 33 publications

(15 citation statements)

References 15 publications

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“…In such a context a broad-band characterization method has been developed in our laboratory [5]. This method is based on the use of a microstrip coupled with a generalized quasi-transverse electromagnetic (quasi-TEM) approach.…”

Section: Previous Workmentioning

confidence: 99%

Generalized Measurement Method for the Determination of the Dynamic Behavior of Magnetic Materials in Any Magnetization State

2010

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A broad-band characterization method based on the junction of the full-wave analysis of a nonreciprocal strip transmission line with a predictive permeability tensor model is presented. The aim of this method is the direct measurement of the permeability tensor components spectra of magnetized thick samples, whatever their magnetization state is. The propagation constants of the dominant transverse electromagnetic (TEM) and higher order modes inside the measurement cell are obtained along with its scattering parameters (S-parameters). The apparition of magnetostatic modes and the nonreciprocal nature of the structure are probed. Procedures based on the use of this method to find accurate values of gyromagnetic resonance and the resonance line width (1 ) are proposed. The direct analysis is validated by comparison of the calculated S-parameters with those obtained with an electromagnetic field simulator based on finite element methods (FEM).

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Section: Previous Workmentioning

confidence: 99%

Generalized Measurement Method for the Determination of the Dynamic Behavior of Magnetic Materials in Any Magnetization State

2010

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“…For this purpose, the S-parameter measurement needs a microstrip line cell electromagnetic analysis ͑direct problem͒ combined with an optimization process ͑inverse problem͒. [15][16][17][18] HFSS software was employed to electromagnetic analysis and optimization procedure. eff was used in the simulation as the initial value.…”

Section: ͑11͒mentioning

confidence: 99%

A broadband permeability measurement of FeTaN lamination stack by the shorted microstrip line method

Chen

et al. 2009

Journal of Applied Physics

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Articles you may be interested inHigh-frequency permeability spectra of FeCoSiN / Al 2 O 3 laminated films: Tuning of damping by magnetic couplings dependent on the thickness of each ferromagnetic layer J. Appl. Phys. 105, 043902 (2009); 10.1063/1.3078112 Broadband complex permeability characterization of magnetic thin films using shorted microstrip transmissionline perturbation Rev. Sci. Instrum. 76, 063911 (2005); 10.1063/1.1935429 Micromagnetic studies of high frequency permeability in Fe-M-N thin films with macroscopic and mesoscopic sizes

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“…19 In addition, a variety of size, shape, and surface effects that manifest themselves at nanoscale is interesting from the physics point of view. [35][36][37] It is worth noting that a large number of studies of composite systems consisting of nanometer-sized crystallites of magnetic transition metals, such as Fe, Ni, and Co, dispersed in semiconducting or insulating matrix media, such as SiO 2 , ZnO, and Al 2 O 3 , have been reported in the recent literature. 21 Technologists also appreciate the potential advantages of synthetic compounds with useful electromagnetic and magnetic properties together with low weight, tunability of the properties by chemical design, lowcost mass production, and flexible products.…”

Section: A Overviewmentioning

confidence: 99%

“…25,26,37,87,88 Polder 11 theoretically approached the problem of the tensorial analysis of the permeability in a uniformly magnetized single-domain anisotropic magnetic particle. 25,26,37,87,88 Polder 11 theoretically approached the problem of the tensorial analysis of the permeability in a uniformly magnetized single-domain anisotropic magnetic particle.…”

Section: B Basic Facts About the Electromagnetic Properties Of Granumentioning

confidence: 99%

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Electromagnetism and magnetization in granular two-phase nanocomposites: A comparative microwave study

Brosseau

Mallegol

Quéffélec

et al. 2007

Journal of Applied Physics

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Electromagnetic and magnetic properties of multicomponent metal oxides heterostructures: Nanometer versus micrometer-sized particles J. Appl. Phys. 93, 9243 (2003); 10.1063/1.1570935Influence of cobalt and nickel substitutions on populations, hyperfine fields, and hysteresis phenomenon in magnetite Cold-pressed powder compacts in our experiments were prepared from commercial nanopowders of ZnO, Ni, Co and ␥-Fe 2 O 3 . A systematic study of the room temperature effective permeability tensor of composite samples made of these nanophases is performed and provides a signature for the nonreciprocity of wave propagation in these nanostructures. Our measurements which cover a broad range of frequency in the microwave region provide a wealth of information leading to a much better understanding of the electromagnetic wave transport in nanogranular materials throughout this frequency range. We report our observations on the frequency and composition dependences of the permeability tensor components of a large set of nanocomposites ͑NCs͒ at different magnetic fields. It is found that mixing Ni nanoparticles with ZnO nanoparticles results in a smaller linewidth of the gyromagnetic resonance and an increased coercivity compared to a sample consisting solely of Ni nanoparticles. On the contrary, mixing of Co nanoparticles with ZnO nanoparticles resulted in the disappearance of the off-diagonal component of the permeability tensor and an increase in coercivity. Deviations of the saturation magnetization of Ni and Co in the Ni/ ZnO and Co/ ZnO NCs from bulklike values were observed. It is believed that the different microwave magnetic behaviors of the Ni/ ZnO and Co/ ZnO NCs are related to the difference in magnetic anisotropy of the Ni and Co particles. It is argued that surface and boundaries in the samples can play a significant role in the microwave magnetic response of these nanostructures. These NCs are promising for implementing the nonreciprocal functionality employed in many microwave devices, including isolators and circulators.

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Automatic measurement of complex tensorial permeability of magnetized materials in a wide microwave frequency range

Cited by 33 publications

References 15 publications

Generalized Measurement Method for the Determination of the Dynamic Behavior of Magnetic Materials in Any Magnetization State

Generalized Measurement Method for the Determination of the Dynamic Behavior of Magnetic Materials in Any Magnetization State

A broadband permeability measurement of FeTaN lamination stack by the shorted microstrip line method

Electromagnetism and magnetization in granular two-phase nanocomposites: A comparative microwave study

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