Though numerous spintronic switching devices have been proposed or demonstrated, there has been significant difficulty in translating these advances into practical computing systems. The challenge of cascading has impeded the integration of multiple devices into a logic family, and several proposed solutions potentially overcome these challenges. Here, the cascading techniques by which the output of each spintronic device can drive the input of another device are described for several logic families, including spin-diode logic (in particular, all-carbon spin logic), complementary magnetic tunnel junction logic (CMAT), and emitter-coupled spin-transistor logic (ECSTL).
Joseph S. Friedman, "Spintronic logic: from switching devices to computing systems," Proc. SPIE 10357, Spintronics X, 103570K (Presented at SPIE Nanoscience + Engineering: August 06, 2017; Published: 5 September 2017); https://doi.org/10.1117/12.2266802.
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