Progress toward magnetoelectric spintronics
Abstract
Ferromagnetic materials can be used for information storage because they have bistable states that can be seen as “1” and “0.” In magnetic-based memory devices such as magnetic tapes, magnetic hard drives, and magnetic random access memory, information is stored by switching the magnetic state using a magnetic field that is generated by electric currents. Such a field should, however, be larger enough to overcome the coercive field of the materials and thus consumes a large amount of power. Although the spin transfer torque generated by the spin current lowers the current requirement of switching one bit by orders of magnitude, ...
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