Decrease permeability of ferromagnetic materials

[apb86]

Hello.

I know very few things about solid state physics, so my question is very basic.. I'm just searching for a clue..
Have some of you ever heard about, or imagine a way, of decreasing the permeability of a ferromagnetic material? Not by raising temperature, but with electric field or electric current maybe?

Thanks
Best Regards
Alexandre

 

[Naty1]

Check out this article for some insights:

http://en.wikipedia.org/wiki/Saturation_(magnetic )

note especially the second diagram...

and also note the PERMEABILITY "See Also' reference at the bottom of the page.

Note that permeability is in general not a fixed constant and varies with the frequency of an applied electromagnetic field.