Magnetic permeability (not to scale): B - flux density, H - magnetic field, μ<sub>f</sub> - permeability of ferromagnets (and ferrimagnets), μ<sub>p</sub> - permeability of paramagnets, μ<sub>0</sub> - permeability of free space (4*π*10<sup>-7</sup> H/m), μ<sub>d</sub> - permeability of diamagnets
<a href="//commons.wikimedia.org/wiki/User:Zureks" title="User:Zureks">Zureks</a>
2009
<span class="int-own-work" lang="en">Own work</span>