Tohoku University Technology: Magnetic metamaterial, spin current control device and spin current control method: T20-3091
The direction and magnitude of the spin flow can be freely controlled by light!
In recent years, spintronics, which make active use of the small magnetic property (spin) of electrons, has attracted attention from the viewpoint of realizing devices with low power consumption and high density. Many of the spintronics functions are driven by a spin flow. So the pioneering of innovative generation and control methods of spin flow has been required. The present invention is a new development of magnetic metamaterials with artificially manipulated symmetry in nano space, and pioneered a new principle that completely controls the propagation direction and magnitude of spin flow at room temperature and at ultra-high speed by the polarization state of light pulses. The present invention is expected not only to dramatically improve the degree of freedom in designing next-generation spintronics devices, but also to be applied to ultrafast optical spintronics, in which conventional optical science and spintronics technologies are developed through nanotechnology.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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