3D modeling of magnetoimpedance effect

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Dear sir/madam

I would like to simulate thin film MI sensor. Here I tried to use the mef physics from the AC/DC module but have not been successful. I want to see the impedance change in a three layered device (ferromag material/metal/ferromag) as a function of an extrenal magnetic field. The inputs are: - Hext (external magnetic field) is applied parallel to an external AC current through the device with a frequency of 10MHz. The current is accoplished by putting an electric potential of 5V accross the device. - A permeability table is imported where the permeability has a real and an imaginary part, and is a function of Hext. The permeability is used by applying an interpolation funtion in the ferromagnetic material under basic settings.

However, now I don't get any change in impedance.

Could you please give me a direction on how to perfrom the simulations correctly. Any details would be highly helpful. I can also add here a copy of the comsol file if that is needed.

0 Replies Last Post Mar 23, 2023, 1:27 p.m. EDT
COMSOL Moderator

Hello Brahim elMansouri

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