A paramagnetic salt with magnetic ions per cubic metre has measured susceptibility at

PHYSICS · Subjective · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Magnetic materials · Magnetic materials

The Boundary-Value Problem, Ch Diamagnetism, paramagnetism and magnetic susceptibility

Problem

A paramagnetic salt with

N_v=2.0\times10^{27}

magnetic ions per cubic metre has measured susceptibility

\chi_m=6.2\times10^{-4}

T=293\,\mathrm{K}

, a temperature at which the Curie law

\chi_m=\mu_0N_vm^2/3k_BT

is known to hold. Find the effective moment per ion in units of the Bohr magneton.