Initialization-Free Multilevel States Driven by Spin-Orbit Torque Switching.

Huang, Kuo-Feng; Wang, Ding-Shuo; Tsai, Ming-Han; Lin, Hsiu-Hau; Lai, Chih-Huang · Adv Mater · 2017

basic_science · Level V

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Abstract

By engineering multidomain formation in Co/Pt multilayers, it is demonstrated how multilevel storage can be achieved by spin-orbit torque switching. It is rather remarkable that, by modulating the writing pulse conditions, the final magnetization states can be controlled, independent of the initial configurations. The initialization-free multilevel memory advances the spin-orbit-torque magnetic random access memory to higher storage density for practical applications.