Influence of the electrical resistivity of a ferromagnetic thin film on its permeability measurement performed with a permeameter

Jacquart, Pierre-Marie; Roux, Laurent

doi:10.1016/j.jmmm.2004.04.092

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…[37,38] Combining with traditional testing methods, our group proposed a soft magnetic thin film magnetic spectrum testing method without calibration based on electromagnetic induction principle. [11,12] 4.1. Equivalent circuit method…”

Section: Traditional Shorted Circuit Microstrip Test Methodsmentioning

confidence: 99%

“…This method is also one of the most commonly used high-frequency magnetic spectrum testing methods in our research group. [11,12] A standard sample is required to calibrate the test thus yielding a calibration factor "K", in the process of measuring the magnetic spectrum of the soft magnetic film with a short circuit microstrip line clamp. Recently, some researches have shown that the scaling factor K varies with frequency, which can be obtained by simulation software or from the complex mathematical formula calculation, [53,54] but this process is relatively tedious.…”

Section: Three-step Approachmentioning

confidence: 99%

“…The four-part method is used to calculate the thin film magnetic spectrum. [11] In this study, the permeability values of CoZr films at different temperatures are studied as shown in Fig. 18.…”

Section: Shorted Microstrip Line Probementioning

confidence: 99%

“…These measurement methods are described in detail in the following sections. [6][7][8][9][10][11][12][13][14] Moreover, microwave devices can be operated at temperatures higher than room temperature because of their thermal effects. [15][16][17][18] So, it is very necessary to investigate the magnetic properties of magnetic thin films at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Techniques of microwave permeability characterization for thin films*

Li¹,

Wang²,

Chai³

2019

Chinese Phys. B

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We review the microwave methods to characterize the material properties, including the established and the emerging techniques in material characterization, especially the permeability spectra of the magnetic thin films. Almost all aspects of the microwave techniques for characterizing the permeability of thin films at microwave frequencies, including the new methods developed by our group, are presented. Firstly, the introduction part is presented. Secondly, the coaxial-line with transmission/reflection methods and the pickup coil with electromagnetic induction method are presented. Thirdly, the most widely used shorted microstrip technique is discussed in detail by the equivalent circuit method, transmission line method, and electromagnetic induction method. Fourthly, the coplanar waveguide method and the near-field probe method are also introduced. Finally, the high temperature permeability characterization by using the shorted microstrip line, the near-field microwave probe, and the shorted microstrip line probe are described in detail. This paper may be useful for researchers or engineers who will build up such measurement fixture to make full use of the existing methods or to develop original methods to meet the requirements for ever-rising measurements.

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