Looking for image theory regarding magnetic elements.

Are PMC always metal compound like Iron etc. That has high ##\mu##? So most of good magnetic conductor are themselves electric conductor?

From articles I read:

PEC ##\Rightarrow\;\hat n \times \vec E=0\;\hbox{ and }\;\hat n\times \vec H=\vec J##.
PMC ##\Rightarrow\;\hat n \times \vec H=0\;\hbox{ and }\;\hat n\times \vec E=-\vec M##.

Is there anything else?

Thanks