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

Explanation

The comparison between the spinning of a proton and an electron can be done by comparing their magnetic dipole moment which can be given by.
Magnetic dipole moment of proton,
`M_(p) = (eh)/( 4 pi m_(p) )`
`M_(e) = (eh)/( 4 pi m_(e) ) `
`therefore M prop (1)/( m) " "[because (eh)/( 4 pi) " constant" ]`
`therefore (M_p)/( M_e) = (m_e)/( m_p) `
`therefore M_p = (M_c xx m_c)/( 1837 m_e) " "[because m_(p) = 1837 m_(e) ]`
`therefore M_(p) lt lt M_(e)`
This shows the effect of magnetic moment of proton is neglected as compared to that of electron.