Relative Permeability and Magnetic Susceptibility
Relative permeability, sometimes denoted by the symbol μr, is the ratio of the permeability of a specific medium to the permeability of free space, μ0:
where μ0 = 4π × 10−7 N A−2. In terms of relative permeability, the magnetic susceptibility is
χm, a dimensionless quantity, is sometimes called volumetric or bulk susceptibility, to distinguish it from χp (magnetic mass or specific susceptibility) and χM (molar or molar mass susceptibility).
Read more about this topic: Permeability (electromagnetism)
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