Abstract
The spin susceptibility tensor ${\ensuremath{\chi}}_{s}^{ij}(T)$ of an impure superconductor (SC) with broken mirror symmetry has been evaluated and a great effect of impurity scattering has been shown. As opposed to conventional singlet superconductors, where the ordinary impurity scattering is known to have no effect on ${\ensuremath{\chi}}_{s}(T)$, the spin susceptibility of a polar symmetry superconductor with $s$-wave pairing can be isotropic and equal to its value in the normal state in the ``dirty'' limit ${T}_{c}\ensuremath{\tau}⪡1$, while the superconductor stays in a full-gap state. The effect is bound up with spin-flip transitions which accompany the electron scattering in conductors with the band spin-orbit coupling.
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