New Research


Recent progresses in the “Spintronics”

−Control of spins in the nano and molecular structures−

Professor Yoshishige Suzuki, Associate professor Masashi Shiraishi, Assistant professor Takayuki Noz

Two possessions of an electron, i.e. charge and spin, have been used separately in the fields of semiconductor physics and magnetism. In our group, we aim to establish “Nano-spintronics”, in which those two properties are coupled ingeniously in the nano-world.
Recently, by injecting spins into high quality magnetic tunnel junctions, we have shown an energy saving magnetization reversal (Appl. Phys. Exp. 1, 061303 (2008).) and a high power r.f. oscillation (Nature Phys. 4, 803 (2008)).
In addition, an extremely low power magnetization control was successfully demonstrated at room temperature using ultrathin iron films very recently (Nature Nanotech., adv. Online pub. 2009) (Top figure). We are also trying to manipulate spins in the molecule, and succeeded in obtaining a spin-dependent transport in Co nano particle-C60 system (Jpn. J. Appl. Phys. Exp. Lett. 45, L717 (2006)) and the injection of the spins into the graphene (Jpn. J. Appl. Phys. Exp. Lett.) 46, L605 ( 2007)) and its manipulation (Appl. Phys. Lett., in press).
Coherent and thermal properties of spins in nano-scale will be clarified to realize new functional devices using the spins dynamics, such as carbon spin-FET.
Please visit following URL for details.

Suzuki laboratory web page
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