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Spin Current in Ferromagnet-Insulator-dWave Superconductor Junctions

DONG Zheng-chao (Department of Physics, Huaiyin Teachers College, Huaian 223001, China)  
Taking into account the exchange interaction in the ferromagnet, and rough interface scattering, spin flip and ferromagnetic scattering effects in insulator, within Bogoliubov de Gennes equation, we calculated the spin current in the ferromagnet-insulator-d wave superconductor junctions. It is show that the interface roughness gives rise to an increase in spin current, and the spin flip and the ferromagnetic scattering lead to a decrease in spin current.
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