Why can't capacitors use magnetic materials?
I'm afraid this kind of request does not involve the capacitor element itself, but the external environment, such as working in high frequency electromagnetic field environment instrument, to avoid the influence of electromagnetic field distribution of the material, to the magnetic properties of materials (such as nuclear magnetic resonance examination instrument).
The method of reducing parasitic inductance of capacitors is to improve manufacturing structures rather than materials.
There is only an electric field in the capacitor and there is no magnetic field. Is the magnetic material indifferent? As long as you wish, you can still use the iron sheet to make the capacitor.
