$A$ proton has spin and magnetic moment just like an electron. Why then is its effect neglected in the magnetism of materials?

(N/A) The magnetic dipole moment of a particle is inversely proportional to its mass,given by the relation $M = \frac{eh}{4\pi m}$.
For a proton,the magnetic dipole moment is $M_{p} = \frac{eh}{4\pi m_{p}}$.
For an electron,the magnetic dipole moment is $M_{e} = \frac{eh}{4\pi m_{e}}$.
Taking the ratio,we get $\frac{M_{p}}{M_{e}} = \frac{m_{e}}{m_{p}}$.
Since the mass of a proton $m_{p}$ is approximately $1837$ times the mass of an electron $m_{e}$ $(m_{p} \approx 1837 m_{e})$,we have $\frac{M_{p}}{M_{e}} = \frac{m_{e}}{1837 m_{e}} = \frac{1}{1837}$.
Thus,$M_{p} = \frac{M_{e}}{1837}$.
This shows that the magnetic moment of a proton is about $1837$ times smaller than that of an electron. Therefore,the magnetic effect of a proton is negligible compared to that of an electron in the magnetism of materials.