Spin Caloritronic Nano Oscillator
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 18, 2017
- Accession Number
- AD1058165
Entities
People
- A. Smith
- Alejandro Jara
- C. Safranski
- H. K. Lee
- Hongrok Chang
- I. Barsukov
- I. N. Krivorotov
- John F. Lindner
- Kiersten D. Lenz
- Min Wu
- T. Schneider
- Yaroslav Tserkovnyak
Organizations
- University of California