Contribution to new IoT society from Spintronics
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Contribution to new IoT society from Spintronics
CIC nanoGUNE Seminars
- Speaker
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Prof. Hiromi Yuasa, Kyushu University, Japan
- When
-
2023/03/23
12:00
- Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
- Add to calendar
-
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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 currentâ€, 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