Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
We show that the energy dissipated to write bits in spin-transfer-torque random access memory can be reduced by an order of magnitude if a surface acoustic wave (SAW) is launched underneath the magneto-tunneling junctions (MTJs) storing the bits. The SAW-generated strain rotates the magnetization of every MTJs' soft magnet from the easy towards the hard axis, whereupon passage of a small spin-polarized current through a target MTJ selectively switches it to the desired state with > 99.99% probability at room temperature, thereby writing the bit. The other MTJs return to their original states at the completion of the SAW cycle.
Biswas, A.K., Bandyopadhyay, S., Atulasimha, J. Acoustically assisted spin-transfer-torque switching of nanomagnets: An energy-efficient hybrid writing scheme for non-volatile memory. Applied Physics Letter, 103, 232401 (2013). Copyright © 2013 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications