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University of Illinois study advances limits for ultrafast nano-devices
Date:7/10/2014

as thermally-driven and believe that our results extend the emerging discipline of spin caloritronics into the regime of picosecond time scales.

The benefits of thermal generation over electric generation are two-fold, according to Choi.

"Thermal spin generation has a potential for higher efficiency than spin generation by electrical currents. Our work shows that thermal spin current can be large enough to rotate magnetization. Although the amount of spin current is still smaller than what would be required for practical applications, we show the potential of thermal generation.

"The second advantage is the fast timescale. The time scale of spin currents generated by electrical currents is limited to a few nanoseconds. In this work, we are able to create spin current with timescale of a few picoseconds. Picosecond generation of spin current is desirable for fast operation of magnetic memory devices."


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Contact: David G. Cahill
d-cahill@illinois.edu
217-333-6753
University of Illinois College of Engineering
Source:Eurekalert  

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University of Illinois study advances limits for ultrafast nano-devices
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