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Thursday, April 28
11 AM
Sumwalt 120A
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Prof. Ilya Krivorotov
University of California, Irvine

Nanomagnets and Spin Currents: from Nonlinear Dynamics to Spintronics 

A current of spin-polarized electrons applied to a nanoscale metallic 
ferromagnet can alter the magnetic state of the ferromagnet via quantum 
mechanical exchange interaction. This interaction gives rise to several 
new types of strongly nonlinear magnetic dynamics that cannot be 
generated by magnetic fields. I will describe our recent spectroscopic 
measurements of these dynamics in ferromagnetic nanoparticles and 
nanowires. I will also discuss emerging spintronic technologies such 
as nonvolatile memory, microwave oscillators and detectors that 
utilize interactions between spin currents and magnetization.