K. Cai, S. V. Beek, S. Rao, K. Fan, M. Gupta, V. Nguyen, G. Jayakumar, G. Talmelli, S. Couet, G. Kar
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Selective operations of multi-pillar SOT-MRAM for high density and low power embedded memories
We demonstrate a multi-pillar (MP) spin-orbit torque (SOT)-MRAM concept, which enables lower write current and high-density integration. We experimentally demonstrate the selective write operation of multi-bits in CMOS-compatible 300mm integrated top-pinned perpendicular MTJs. Multiple MTJs on a shared SOT track can be individually selected by gate voltages and independently switched by sub-ns pulses with 30% reduction in operation current. Our concept of selective operations with less transistors and lower writing energy will significantly enhance the density and energy efficiency of SOT-MRAM.