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Efficient generation of spin currents from charge currents is of highimportance for memory and logic applications of spintronics. In particular,generation of spin currents from charge currents in high spin-orbit couplingmetals has the potential to provide a scalable solution for embedded memory. Wedemonstrate a net reduction in critical charge current for spin torque drivenmagnetization reversal via using spin-orbit mediated spin current generation.We scaled the dimensions of the spin-orbit electrode to 400 nm and thenanomagnet to 270 nm x 68 nm in a three terminal spin-orbit torque, magnetictunnel junction (SOT-MTJ) geometry. Our estimated effective spin Hall angle is0.15-0.20 using the ratio of zero temperature critical current from spin Hallswitching and estimated spin current density for switching the magnet. We showbidirectional transient switching using spin-orbit generated spin torque at 100ns switching pulses reliably followed by transient read operations. We finallycompare the static and dynamic response of the SOT-MTJ with transient spincircuit modeling showing the performance of scaled SOT-MTJs to enablenanosecond class non-volatile MTJs.

Experimental Demonstration of Efficient Spin-Orbit Torque Switching of an MTJ with sub-100 ns Pulses