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We consider the superconducting state of  $d + s$  symmetry with finite concentration of Anderson impurities in the limit  $\Delta _s /\Delta _d \ll 1$ . The model consists of a BCS‐like term in the Hamiltonian and the Anderson impurity treated in the self‐consistent large‐ N  mean field approximation. Increasing impurity concentration or lowering the ratio  $\Delta _s /\Delta _d$  drives the system through a transition from a state with two sharp peaks at low energies and exponentially small density of states at the Fermi level to one with  $N(0) \simeq (\Delta _s /\Delta _d )^2$ . This transition is discontinuous if the energy of the impurity resonance is the smallest energy scale in the problem.

Magnetic impurity transition in a ( d + s )‐wave superconductor