Research press release


Nature Physics

Magnetization switching using only spin

磁気情報記憶の主要な要素である磁化の可逆的なスイッチングを、電子のスピンのみを用いて電荷の移動を必要とせずに行えることが、Nature Physics(電子版)に報告されている。この技術を用いて、新しい低エネルギー電子デバイスができるかもしれない。


Reversible switching of magnetization ― a key element of magnetic information storage ― can be implemented by using only the spin of electrons, without needing to move their charges as well, shows a study online this week in Nature Physics. This technique could lead to novel, low-energy electronic devices.

Traditional electronics uses the charges of electrons for transporting, storing and processing information. In addition to charge, electrons also possess a property known as spin, which can also perform such functions, but because of the difficulties in producing spin-only currents, most applications still rely on the transport of both spin and charge. However, YoshiChika Otani and co-workers have now managed to create intense pure spin currents, which offer potential advantages such as reduced heating and faster operation.

doi: 10.1038/nphys1095


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