Theory of Solid State Physics group (Prof. Maekawa's group) has developed, in collaboration with Hitachi, Ltd., a new simulation tool for spintronics devices to calculate and control the spin current and spin torque. Through the simulation, the optimum device structure and the current distribution in the device for obtaining the magnetization switching may be predicted. The research group has applied the tool to a ferromagnetic bilayer that has been difficult to be analyzed because of the complicated current distribution. The new tool will help designing spintronics devices. The results have been presented at International Conference on Magnetism (ICM2009) held at Karlsruhe, Germany on July 26 - 31 and reported in news papers (Kagaku Kogyo Nippou, on July 27, 2009 and Nikkan Kogyo Shimbun, on July 30, 2009).
Incident polarized current (green ball and arrow) exerts the unidirectional torque on multilayer consisting of two ferromagnetic layers which couple in anti-parallel.
Prof. Maekawa's group(Theory of Solid State Physics)