magnetic susceptibility
quantitative measure of the extent to which a material may be magnetized in relation to a given applied magnetic field. The magnetic susceptibility of a material, commonly symbolized by chim, is equal to the ratio of the magnetization M within the material to the applied magnetic field strength H, or chim = M/H. This ratio, strictly speaking, is the volume susceptibility, because magnetization essentially involves a certain measure of magnetism (dipole moment) per unit volume
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