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CiteWeb id: 20120000739

CiteWeb score: 719

DOI: 10.1126/science.1218197

One of the primary challenges in the field of spin-electronics, which exploits the electron's spin rather than its charge, is to create strong currents of electrons with polarized spins. One way to do this is to use a ferromagnet as a polarizer, a principle used in magnetic tunnel junctions; however, these devices suffer from reliability problems. An alternative is the spin Hall effect, where running a charge current through a material generates a spin current in the transverse direction, but the efficiency of this process tends to be small. Liu et al. (p. [555][1]) now show that the spin Hall effect in Tantalum in its high-resistance β phase generates spin currents strong enough to induce switching of the magnetization of an adjacent ferromagnet; at the same time, Ta does not cause energy dissipation in the ferromagnet. These properties allowed efficient and reliable operation of a prototype three-terminal device. [1]: /lookup/doi/10.1126/science.1218197

The publication "Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum" is placed in the Top 10000 in category Physics.
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