Making sointronics active with the torque from a pure spin current

CCMMP Seminars
Prof Rob J. Kicken
Alan Drew
February 11th, 2016 at 14:00
GO Jones Room 410

The exploitation of magnetoresistance effects in magnetic field sensing, most notably in magnetic hard disk drives, was the first triumph of passive spintronics.  However, much wider opportunities exist for active spintronics in memory, logic and signal processing.   In an active spintronic device, the transport of electron spin is used to control the spin state of local magnetic moments.  No accompanying transfer of charge is necessary and pure spin currents may be generated by diverse means such as precessional pumping, spin diffusion, and the use of spin-orbit torques.  While the flow of spin current may be detected indirectly by means of the modified magnetic damping of its source and the generation of voltages via the inverse spin Hall effect, this talk will explore how spin currents may be detected directly through the torques that they exert on other spin systems.