# Magnetic susceptibility¶

#Magnetic susceptibility is a dimensionless proportionality constant that indicates the degree of magnetization of a material in response to an applied magnetic field. A related term is magnetizability, the proportion between magnetic moment and magnetic flux density. A closely related parameter is the permeability, which expresses the total magnetization of material and volume.

#The volume magnetic susceptibility, represented by the symbol chi_v (often simply chi , sometimes chi_m magnetic, to distinguish from the electric susceptibility), is defined in the SI units by the following relationship:

$M=\chi H$

Here

• M is the magnetization of the material (the magnetic dipole moment per unit volume), measured in amperes per meter,
• H is the magnetic field strength, also measured in amperes per meter.
• $$\chi$$ is therefore a dimensionless quantity.