Spin-Orbit Torque in Magnetic Bilayers - Spintronics Theory Group
Spin-Orbit Torque in Magnetic Bilayers - Spintronics Theory Group
Spin-Orbit Torque in Magnetic Bilayers - Spintronics Theory Group
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I. <strong>Sp<strong>in</strong></strong>-‐orbit Coupl<strong>in</strong>g Strikes Back <br />
b. A new hope… <br />
S<strong>in</strong>gle Doma<strong>in</strong> Measurements <br />
Methods: GHz sp<strong>in</strong>-‐FMR, kHz modulaOon <br />
Removes effects that depends on texture <br />
Doma<strong>in</strong> Wall Measurements <br />
Methods: Current-‐<strong>in</strong>duced MoOon <br />
Averages the (SO, STT, Damp<strong>in</strong>g) torques <br />
Anatomy of <strong>Sp<strong>in</strong></strong>-‐<strong>Orbit</strong> <strong>Torque</strong>s <br />
ˆT = T ⊥<br />
( θ) ˆm × ŷ +T || ( θ) ˆm × ( ŷ × ˆm )<br />
Miron, Nature Materials 2010, Nature 2011 <br />
Pi, APL 2010; Suzuki, APL 2011 <br />
Liu PRL 2011, PRL 2012, Science 2012; Fan Nat. Com. 2013 <br />
Kim, Nature Materials 2012, Garello Nature Nano 2013 <br />
New effects <br />
Reversed moCon (aga<strong>in</strong>st electron flow) <br />
Doma<strong>in</strong> wall distorCon and ClCng <br />
Complex Current dependence <br />
Miron, Nature Materials 2011 <br />
Emori, Nature Materials 2013 <br />
Ryu, Nature Nanotechnology 2013 <br />
Haazen, Nature Materials 2013 <br />
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