Magnetic permeability (not to scale): $B$ - flux density, $H$ - magnetic field strength, $μ_f$ - permeability of ferromagnets (and ferrimagnets), $μ_p$ - permeability of paramagnets, $μ_0$ - permeability of free space (4 × π × 10-7 H/m), $μ_d$ - permeability of diamagnets
permeabilities_-_magnetica.png
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