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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3628
DTSTART:20150212T220000Z
DTEND:20150212T230000Z
DTSTAMP:20260419T153854Z
LAST-MODIFIED:20150209T152932Z
LOCATION:474 Chamberlin Hall
SUMMARY:Spin orbit interaction induced magnetic dynamics\, R. G. Herb 
 Condensed Matter Seminar\, Luqiao Liu\, IBM TJ Watson Research Center
DESCRIPTION:Controlling magnetic orientation in a fast and energy-effi
 cient way is both fundamentally important and has profound technical i
 mplications. Conventional ways of switching magnetic moment include em
 ploying magnetic fields from current-carrying coil and using the spin 
 transfer torque effect from spin valve structures. Recent studies show
  that spin orbit interaction induced phenomena\, such as the spin Hall
  effect and spin momentum locking in topological insulators\, can prov
 ide effective mechanisms to generate spin currents and to control the 
 orientation of nano-magnets. In this talk\, I will discuss various mag
 netic dynamics that can be excited using spin orbit interactions\, inc
 luding ferromagnetic resonance\, reversible magnetic switching and per
 sistent magnetic oscillations. Compared with conventional spin torque 
 devices\, a higher current-spin conversion efficiency and lower energy
  dissipation are exhibited in those experiments. Besides\, I will also
  talk about experimental approaches that can be utilized to identify t
 he origin and quantify the strength of those effects. With the informa
 tion gained in those studies\, further improvement on the spin generat
 ion efficiency can be expected.
URL:https://www.physics.wisc.edu/events/?id=3628
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