期刊
NATURE COMMUNICATIONS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-017-00184-5
关键词
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资金
- Spins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center - US Department of Energy, Office of Basic Energy Sciences (BES) [DE-SC0012670]
- US Department of Energy, Office of Basic Energy Sciences [DE-SC0012190, DE-SC0014467]
- Army Research Office [W911NF-14-1-0016]
- U.S. Department of Energy (DOE) [DE-SC0014467] Funding Source: U.S. Department of Energy (DOE)
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.
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