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Title: Spin caloritronic nano-oscillator

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 Y 3Fe 5O 12/Pt bilayer nanowires where ohmic heating of the Pt layer results in injection of pure spin current into the Y 3Fe 5O 12 layer. This leads to excitation of auto-oscillations of the Y 3Fe 5O 12 magnetization and generation of coherent microwave radiation. Thus, our work paves the way towards spin caloritronic devices for microwave and magnonic applications.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ;  [4] ;  [5] ;  [3] ;  [1]
  1. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy; Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany). Inst. of Ion Beam Physics and Materials Research
  3. Colorado State Univ., Fort Collins, CO (United States). Physics Dept.
  4. Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden (Germany). Inst. of Ion Beam Physics and Materials Research
  5. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Grant/Contract Number:
SC0012670; SC0012190; W911NF-14-1-0016; SC0014467
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Univ. of California, Irvine, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Army Research Office (ARO)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Ferromagnetism; Magnetic properties and materials; Nanowires; Spintronics
OSTI Identifier:
1425652

Safranski, C., Barsukov, I., Lee, H. K., Schneider, T., Jara, A. A., Smith, A., Chang, H., Lenz, K., Lindner, J., Tserkovnyak, Y., Wu, M., and Krivorotov, I. N.. Spin caloritronic nano-oscillator. United States: N. p., Web. doi:10.1038/s41467-017-00184-5.
Safranski, C., Barsukov, I., Lee, H. K., Schneider, T., Jara, A. A., Smith, A., Chang, H., Lenz, K., Lindner, J., Tserkovnyak, Y., Wu, M., & Krivorotov, I. N.. Spin caloritronic nano-oscillator. United States. doi:10.1038/s41467-017-00184-5.
Safranski, C., Barsukov, I., Lee, H. K., Schneider, T., Jara, A. A., Smith, A., Chang, H., Lenz, K., Lindner, J., Tserkovnyak, Y., Wu, M., and Krivorotov, I. N.. 2017. "Spin caloritronic nano-oscillator". United States. doi:10.1038/s41467-017-00184-5. https://www.osti.gov/servlets/purl/1425652.
@article{osti_1425652,
title = {Spin caloritronic nano-oscillator},
author = {Safranski, C. and Barsukov, I. and Lee, H. K. and Schneider, T. and Jara, A. A. and Smith, A. and Chang, H. and Lenz, K. and Lindner, J. and Tserkovnyak, Y. and Wu, M. and Krivorotov, I. N.},
abstractNote = {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. Thus, our work paves the way towards spin caloritronic devices for microwave and magnonic applications.},
doi = {10.1038/s41467-017-00184-5},
journal = {Nature Communications},
number = 1,
volume = 8,
place = {United States},
year = {2017},
month = {7}
}