Calculation of the energy loss in giant magnetic impedance elements using the complex magnetic permeability spectra

Driton Rustemaj; Debashis Mukherjee

doi:10.1117/1.JRS.7.073496

18 October 2013 Calculation of the energy loss in giant magnetic impedance elements using the complex magnetic permeability spectra

Driton Rustemaj, Debashis Mukherjee

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 7, Issue 1, 073496 (October 2013). https://doi.org/10.1117/1.JRS.7.073496

Abstract

The giant magnetic impedance (GMI) effect in ferromagnetic materials has been investigated for sensing applications. The GMI properties were evaluated via numerical solution of the complex magnetic permeability of the material. MATLAB® simulation was carried out to study the frequency dependence of magnetic permeability via obtaining solutions of the Landau–Lifshitz–Gilbert (LLG) and the Maxwell’s equations. The results indicate that the complex magnetic permeability peaks at a frequency of 6 GHz, corresponding to the ferromagnetic resonant (FMR) frequency, where the energy loss is maximum. A variation of the Gilbert damping parameter (α ) associated with the LLG equation inversely affects this peak value. The area under the curve of complex magnetic permeability, calculated through counting the number of pixels within the image, provides an estimate of the average energy loss density within the material and appears to be consistent with the variation of the peak intensity.

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Driton Rustemaj and Debashis Mukherjee "Calculation of the energy loss in giant magnetic impedance elements using the complex magnetic permeability spectra," Journal of Applied Remote Sensing 7(1), 073496 (18 October 2013). https://doi.org/10.1117/1.JRS.7.073496

Published: 18 October 2013

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