Question

A paramagnetic substance has $10^{28}$ atoms$/m^{3}$. The magnetic moment of each atom is $1.79\times 10^{-23} A-m^{2}$. Calculate the para magnetic susceptibility of the material at temperature 320ºk. What would be the dipole moment of the rod of this material 0.l m long and lcm2 cross -section placed in a field of $7\times 10^{4} \frac{A}{m}$? $(K=1.38\times 10^{23} J/^0{K},\mu _{0}=4\pi\times 10^{-7} Wb/A-m)$.

Answer 1

The main distinction is that in some materials there is no collective interaction of atomic magnetic moments,