Enhancement of Superconductivity in Disordered Films by Parallel Magnetic Field

We show that the superconducting transition temperature $T_c(H)$ of a very thin highly disordered film with strong spin-orbital scattering can be increased by parallel magnetic field $H$. This effect is due to polarization of magnetic impurity spins which reduces the full exchange scattering rate of electrons; the largest effect is predicted for spin-$\frac12$ impurities. Moreover, for some range of magnetic impurity concentrations the phenomenon of {\sl superconductivity induced by magnetic field