Capacitor with magnetic dielectric

[Stephen03]

Odd question, would anybody know what would happen if a parallel plate capacitor (good conductor) had a soft magnetic material (fairly poor conductor) as a dielectric? What would be the DC/AC electrical characteristics of this?

 

[berkeman]

Odd question, would anybody know what would happen if a parallel plate capacitor (good conductor) had a soft magnetic material (fairly poor conductor) as a dielectric? What would be the DC/AC electrical characteristics of this?

Welcome to the PF.

What are your thoughts? What would the effect on the value of the capacitance be? What would happen to the lossy characteristics of the capacitor? Why?

 

[Stephen03]

Welcome to the PF.

What are your thoughts? What would the effect on the value of the capacitance be? What would happen to the lossy characteristics of the capacitor? Why?

Hi berkeman,
I have actually found an article that I wasn't able to find yesterday describing the permittivity of a capacitor with a ferrite as a dielectric. Here is the link (http://tdserver1.fnal.gov/tdlibry/TD-Notes/2007 Tech Notes/TD-07-014.pdf). The results were that the relative permittivity was close to 14. Assuming this fairly accurate with all ferrite materials, this wouldn't be that good of a capacitor. It is also fairly lossy at higher frequencies. This makes sense as ferrite materials are still somewhat conductive. Off the top of your head, what ferrite would you say has the lowest conductivity?