[QUE/SM-04012] SM-PROBLEM

Consider a spin 1/2 system at temperature T with the Hamiltonian $$H\,=\,A_1 S_3\,-\mu B_0 S_1 $$ where $B_0$ is an external magnetic field. Find the magnetization as a function of (a)temperature and (b) $B_0$.

HSMani