Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System. Li, Y., Cao, W., Amin, V. P., Zhang, Z., Gibbons, J., Sklenar, J., Pearson, J., Haney, P. M., Stiles, M. D., Bailey, W. E., Novosad, V., Hoffmann, A., & Zhang, W. Physical Review Letters, 124(11):117202, March, 2020. Publisher: American Physical Society![Coherent Spin Pumping in a Strongly Coupled Magnon-Magnon Hybrid System [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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/√𝑡Py, verifying the prediction by the coupled Landau-Lifshitz equations.
@article{li_coherent_2020,
title = {Coherent {Spin} {Pumping} in a {Strongly} {Coupled} {Magnon}-{Magnon} {Hybrid} {System}},
volume = {124},
url = {https://link.aps.org/doi/10.1103/PhysRevLett.124.117202},
doi = {10.1103/PhysRevLett.124.117202},
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/√𝑡Py, verifying the prediction by the coupled Landau-Lifshitz equations.},
number = {11},
urldate = {2025-01-08},
journal = {Physical Review Letters},
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, William E. and Novosad, Valentine and Hoffmann, Axel and Zhang, Wei},
month = mar,
year = {2020},
note = {Publisher: American Physical Society},
keywords = {green},
pages = {117202},
}
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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. 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