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Title: Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System.

Abstract

We experimentally identify coherent spin pumping in the magnon-magnon hybrid modes of yttrium iron garnet/permalloy (YIG/Py) bilayers. By reducing the YIG and Py thicknesses, the strong interfacial exchange coupling leads to large avoided crossings between the uniform mode of Py and the spin wave modes of YIG enabling accurate determination of modification of the linewidths due to the dampinglike torque. We identify additional linewidth suppression and enhancement for the in-phase and out-of-phase hybrid modes, respectively, which can be interpreted as concerted dampinglike torque from spin pumping. Furthermore, varying the Py thickness shows that both the fieldlike and dampinglike couplings vary like 1/root t(Py), verifying the prediction by the coupled Landau-Lifshitz equations.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Quantum Materials for Energy Efficient Neuromorphic Computing (Q-MEEN-C); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE Office of Science - Energy Frontier Research Center; Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); University of Maryland
OSTI Identifier:
1609124
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 11
Country of Publication:
United States
Language:
English

Citation Formats

Li, Yi, Cao, Wei, Amin, Vivek P., Zhang, Zhizhi, Gibbons, Jonathan, Sklenar, Joseph, Pearson, John, Haney, Paul M., Stiles, Mark D., Bailey, W E, Novosad, Valentine, Hoffmann, Axel, and Zhang, Wei. Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System.. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.124.117202.
Li, Yi, Cao, Wei, Amin, Vivek P., Zhang, Zhizhi, Gibbons, Jonathan, Sklenar, Joseph, Pearson, John, Haney, Paul M., Stiles, Mark D., Bailey, W E, Novosad, Valentine, Hoffmann, Axel, & Zhang, Wei. Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System.. United States. https://doi.org/10.1103/PhysRevLett.124.117202
Li, Yi, Cao, Wei, Amin, Vivek P., Zhang, Zhizhi, Gibbons, Jonathan, Sklenar, Joseph, Pearson, John, Haney, Paul M., Stiles, Mark D., Bailey, W E, Novosad, Valentine, Hoffmann, Axel, and Zhang, Wei. 2020. "Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System.". United States. https://doi.org/10.1103/PhysRevLett.124.117202.
@article{osti_1609124,
title = {Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System.},
author = {Li, Yi and Cao, Wei and Amin, Vivek P. and Zhang, Zhizhi and Gibbons, Jonathan and Sklenar, Joseph and Pearson, John and Haney, Paul M. and Stiles, Mark D. and Bailey, W E and Novosad, Valentine and Hoffmann, Axel and Zhang, Wei},
abstractNote = {We experimentally identify coherent spin pumping in the magnon-magnon hybrid modes of yttrium iron garnet/permalloy (YIG/Py) bilayers. By reducing the YIG and Py thicknesses, the strong interfacial exchange coupling leads to large avoided crossings between the uniform mode of Py and the spin wave modes of YIG enabling accurate determination of modification of the linewidths due to the dampinglike torque. We identify additional linewidth suppression and enhancement for the in-phase and out-of-phase hybrid modes, respectively, which can be interpreted as concerted dampinglike torque from spin pumping. Furthermore, varying the Py thickness shows that both the fieldlike and dampinglike couplings vary like 1/root t(Py), verifying the prediction by the coupled Landau-Lifshitz equations.},
doi = {10.1103/PhysRevLett.124.117202},
url = {https://www.osti.gov/biblio/1609124}, journal = {Physical Review Letters},
number = 11,
volume = 124,
place = {United States},
year = {Tue Mar 17 00:00:00 EDT 2020},
month = {Tue Mar 17 00:00:00 EDT 2020}
}

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