Data from wikipedia needs some care. Many times the information posted on Wiki is not moderated - so a double check is always good. ----- Original Message ----- From: Morten Aarøe To: General MEMS discussion Sent: Wednesday, February 20, 2008 3:33 PM Subject: Re: [mems-talk] Electromagnetics According to Wikipedia[1] (or somewhere else, but everyone has Wikipedia :-) ), the magnetic permeability is the volumetric susceptability plus one \mu_r = \chi_m + 1 \chi_m can be found from the link, I sent the last time[2], but the value is \chi_m = -3.73E-6 // Morten Aaroe [1]: http://en.wikipedia.org/wiki/Permeability_%28electromagnetism%29 [2]: http://www.periodictable.com/Elements/014/data.html David Nemeth wrote: > No, that's the dielectric constant. The magnetic permeability should be 1 > or very close to it. > > David Nemeth > >