Definitions of Magnetisation, Magnetic Intensity, and Magnetic Suceptibility

Magnetisation

• Definition: Magnetisation ($\vec{M}$) is defined as the ratio of magnetic moment ($\vec{m}_{\text{net}}$) to the volume ($V$) of material.

• Formula: $\vec{M} = \frac{\vec{m}_{\text{net}}}{V}$

Magnetic Intensity

• Definition: Magnetic intensity ($H$) is defined as the ratio of strength of magnetic field ($B$) to the permiability of free space ($\mu_0$).

• Formula: $H = \frac{B}{\mu_0}$

Magnetic Suceptibility

• Definition: Magnetic suceptibility ($\chi$) is defined as the ratio of magnetude of magnetisation intensity ($M$) to the magnetic intensity ($H$) in magnitude.

• Formula: $\chi = \frac{M}{H}$

• Unit: SI unit