Contribution to new IoT society from Spintronics

CIC nanoGUNE Seminars

Speaker

Prof. Hiromi Yuasa, Kyushu University, Japan

When

2023/03/23
11:00

Place

nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian

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**Contribution to new IoT society from Spintronics** Prof. Hiromi Yuasa Kyushu University, Japan Our target is contribution to new IoT society by using spintronic technology that is original for magnetic materials. In spintronics, a spin of electron plays an important role in addition to electron. Phenomena based on the characteristics difference between up-spin and down-spin are unique, one of which can realize green devices without Joule loss in extreme condition. We challenge to propose novel devices originated from Spintronics toward sustainable society. * Topic 1: Electromotive force in magnetic film We are researching the devices by using “spin current”, one of which is a thermoelectric generator based on spin Seebeck effect or anomalous Nernst effect. Magnetic materials enable us to make a uniform electromotive generator. Our goal is to propose a novel generator and contribute to energy harvesting society. * Topic 2: MRAM and new information carriers We are investigating structures and materials that reduce the write power of non-volatile magnetic memory by spin-orbit torque. In addition, to utilize a new information carrier that has the potential to be minute, high-speed, and low-power, we have begun to verify ideas that combine these three advantages with stable topological skyrmions. * Topic 3: Magnetization oscillator toward Sub-THz In a magnetic laminated film with a thickness of several nanometers, a phenomenon called spin- torque oscillation, in which the magnetization continues precession when an electric current is passed, can be obtained. By introducing a unique magnetic coupling to this, a sub-THz oscillator was shown by calculation. We are working to prove it on a real device. * Key words Spintronics, magnetic films, magnetic devices, memory, oscillator, thermos- generator **Host:** A. Berger