Spin current related phenomena in metallic nano-structures

The transport properties of diffusive spin currents have been investigated in lateral ferromagnetic/nonmagnetic metal hybrid structures. The spin diffusion processes were found strongly dependent on the magnitude of the spin resistances of connected materials. The efficient spin injection and detection are accomplished by optimizing the junction structures on the basis of the spin resistance circuitry. The magnetization switching of a nano-scale ferromagnetic particle and also room temperature spin Hall effect measurements were demonstrated by using an efficient pure-spin-current injection.