Local density of states in superconductor-ferromagnetic hybrid systems

In this letter we discuss various properties of the local density of states (DOS) for a superconductor-ferromagnet hybrid system. The DOS is modified at small energies on both sides of the interface. Due to the interplay of s uperconductivity and ferromagnetism, the local DOS depends on the spin dire ction. The spin polarization effects extend over a long distance from the i nterface both in the superconductor and in the ferromagnet. If the ferromag net is of finite length, the DOS shows a spin-dependent gap.