Spin caloritronic nano-oscillator.

Spin caloritronic nano-oscillator.
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DOI:
10.1038/s41467-017-00184-5
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发表时间:
2017-07-18
影响因子:
16.6
通讯作者:
Krivorotov IN
Krivorotov IN
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Safranski C;Barsukov I;Lee HK;Schneider T;Jara AA;Smith A;Chang H;Lenz K;Lindner J;Tserkovnyak Y;Wu M;Krivorotov IN

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Energy loss due to ohmic heating is a major bottleneck limiting down-scaling and speed of nano-electronic devices, and harvesting ohmic heat for signal processing is a major challenge in modern electronics. Here, we demonstrate that thermal gradients arising from ohmic heating can be utilized for excitation of coherent auto-oscillations of magnetization and for generation of tunable microwave signals. The heat-driven dynamics is observed in Y3Fe5O12/Pt bilayer nanowires where ohmic heating of the Pt layer results in injection of pure spin current into the Y3Fe5O12 layer. This leads to excitation of auto-oscillations of the Y3Fe5O12 magnetization and generation of coherent microwave radiation. Our work paves the way towards spin caloritronic devices for microwave and magnonic applications. Harvesting ohmic heat for signal processing is one of major challenges in modern electronics and spin caloritronics, but not yet well accomplished. Here the authors demonstrate a spin torque oscillator device driven by pure spin current arising from thermal gradient across an Y3Fe5O12/Pt interface.
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