Abstract
The tunneling magnetoresistance (TMR) in ferromagnet/d-wave superconductor/ferromagnet double tunnel junctions is studied theoretically. The spin-polarized tunneling current gives rise to a nonequilibrium spin density in superconductor in the case of antiferromagnetic alignment of the magnetization. It is shown that the zero-energy states formed at interface of the d-wave superconductor significantly influences the spin density. The resulting TMR depends on the crystal orientation of the junction.
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