# Why susceptibility of diamagnetic materials is negative?

As we have discussed in the earlier articles, that relative permeability of diamagnetic materials is lesser than 1 and  also there is a relation between relative permeability (μr)and susceptibility (χ):

μr = 1 + χ

where is μr

or χ = μr – 1

and μr is less than 1

therefore, χ is negative