Resonantly enhanced strip-line technique to measure microwave permeability of thin films

Starostenko, S. N.; Rozanov, Konstantin N.

doi:10.1016/j.jmmm.2009.04.076

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…The SB-FMR technique is much more sensitive [2,3], the sample is uniformly magnetised but the calculated permeability data may differ from that ones obtained under zero bias and the technique is poorly suited for measurements within a range of frequencies. The SF-VNA measurements are performed under non-zero external bias as well [5,6], but the sensitivity of SF-VNA technique is much lower than that of SB-FMR one even in case of the resonance enhancement [7] as the measurement errors (the signal to noise ratio, SNR) are defined by calibration accuracy of a measurement cell [4]. The SF-VNA measurements are usually performed either in a coaxial line or in a strip-line.…”

Section: Introductionmentioning

confidence: 99%

“…The problem is that the measured washer samples are usually wound of film stripes, therefore the coaxial measurements are limited to flexible substrates and the obtained data are distorted by magnetostriction [5,6,10,11]. The stripe cells are calibrated less accurately and the measurements inherit the problems of radiation into surrounding space [4,7].…”

Section: Introductionmentioning

confidence: 99%

“…The coaxial-to-strip junction inhomogeneity, the effects of non-uniform field inside the cell and the permittivity contribution are taken into account by measurement of a reference sample with known constitutive parameters. The calculation of complex permeability µ from the measured complex reflection coefficient R is identical to the published procedure [4,7].…”

Section: Introductionmentioning

confidence: 99%

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The Study of Structure-Dependent Properties of Thin Magnetic Films at Microwaves by Field-Domain Resonance Technique

Starostenko¹,

Rozanov²

2009

PIER C

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Abstract-The strip-line frequency-domain technique for permeability measurement is compared to the field domain technique. The combined setup for microwave measurement of thin film permeability with both techniques is proposed. The field-domain technique is less affected by inhomogeneity of measurement strip cell and has significantly higher signal-to-noise ratio, but the obtained parameters are affected by film thickness and may differ from that of the frequency-domain technique. Analysis of the field-domain data obtained at a set of frequencies makes it possible to determine the saturation magnetisation, the anisotropy field and the damping factor without the knowledge of the amount of substance under study. In case of a simple permeability spectrum the data on metal thickness make it possible to estimate the effective skin-depth as well. The technique is tested by simulation and is applied to determine permeability of Fe-based films vacuum-sputtered on glassceramic and polymer substrates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Study of Structure-Dependent Properties of Thin Magnetic Films at Microwaves by Field-Domain Resonance Technique

Starostenko¹,

Rozanov²

2009

PIER C

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Improved accuracy thin film permeability extraction for a microstrip permeameter

Sebastian

Clavijo

Díaz

2013

Journal of Applied Physics

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It is shown using full-wave simulations that several of the conventional assumptions made for extracting permeability data from a microstrip permeameter are not justified. In particular, the proportionality between the measured effective permeability in the device and the true permeability of the film is not a constant. It is a function of the permeability of the film, its geometry and the dimensions of the microstrip permeameter. A model exploiting the analyticity of the function relating effective to true permeability is used to derive this proportionality function for our device and the results are confirmed using full-wave simulations. The error incurred by not using this method and employing a reference sample for calibration or by using saturation magnetization “Ms” and anisotropy field “Ha” is shown to be anywhere between 5% and 40% and possibly even more. Our measurement set up is capable of measuring films as thin as 300 nm with a relative permeability as low as 10.

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Automated Measuring Unit for Analysis of Thin Magnetic Film Ferroresonance Spectrum

Burmitskikh

Boev

Izotov

et al. 2019

2019 International Siberian Conference on Control and Communications (SIBCON)

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Resonantly enhanced strip-line technique to measure microwave permeability of thin films

Cited by 5 publications

References 8 publications

The Study of Structure-Dependent Properties of Thin Magnetic Films at Microwaves by Field-Domain Resonance Technique

The Study of Structure-Dependent Properties of Thin Magnetic Films at Microwaves by Field-Domain Resonance Technique

Improved accuracy thin film permeability extraction for a microstrip permeameter

Automated Measuring Unit for Analysis of Thin Magnetic Film Ferroresonance Spectrum

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