Fully resonant magneto-elastic spin-wave excitation by surface acoustic waves under conservation of energy and linear momentum
We report on the resonant excitation of spin waves in micro-structured magnetic thin films by short-wavelength surface acoustic waves (SAWs). The spin waves as well as the acoustic waves are studied by micro-focused Brillouin light scattering spectroscopy. At low magnetic bias fields, a resonant pho...
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| Veröffentlicht in: | Applied physics letters 2022-06, Vol.120 (24) |
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| creator | Geilen, Moritz Nicoloiu, Alexandra Narducci, Daniele Mohseni, Morteza Bechberger, Moritz Ender, Milan Ciubotaru, Florin Hillebrands, Burkard Müller, Alexandru Adelmann, Christoph Pirro, Philipp |
| description | We report on the resonant excitation of spin waves in micro-structured magnetic thin films by short-wavelength surface acoustic waves (SAWs). The spin waves as well as the acoustic waves are studied by micro-focused Brillouin light scattering spectroscopy. At low magnetic bias fields, a resonant phonon–magnon conversion is possible, which results in the excitation of short-wavelength spin waves. Using micromagnetic simulations, we verify that during this excitation both energy and linear momentum are conserved and fully transferred from the SAW to the spin wave. This conversion can already be detected after an interaction length of a few micrometers. Thus, our findings pave the way for miniaturized magneto-elastic spin-wave emitters for magnon computing. |
| doi_str_mv | 10.1063/5.0088924 |
| format | Article |
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The spin waves as well as the acoustic waves are studied by micro-focused Brillouin light scattering spectroscopy. At low magnetic bias fields, a resonant phonon–magnon conversion is possible, which results in the excitation of short-wavelength spin waves. Using micromagnetic simulations, we verify that during this excitation both energy and linear momentum are conserved and fully transferred from the SAW to the spin wave. This conversion can already be detected after an interaction length of a few micrometers. Thus, our findings pave the way for miniaturized magneto-elastic spin-wave emitters for magnon computing.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/5.0088924</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Conversion ; Emitters ; Magnons ; Micrometers ; Momentum ; Surface acoustic waves ; Thin films ; Wave excitation</subject><ispartof>Applied physics letters, 2022-06, Vol.120 (24)</ispartof><rights>Author(s)</rights><rights>2022 Author(s). 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The spin waves as well as the acoustic waves are studied by micro-focused Brillouin light scattering spectroscopy. At low magnetic bias fields, a resonant phonon–magnon conversion is possible, which results in the excitation of short-wavelength spin waves. Using micromagnetic simulations, we verify that during this excitation both energy and linear momentum are conserved and fully transferred from the SAW to the spin wave. This conversion can already be detected after an interaction length of a few micrometers. 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| subjects | Applied physics Conversion Emitters Magnons Micrometers Momentum Surface acoustic waves Thin films Wave excitation |
| title | Fully resonant magneto-elastic spin-wave excitation by surface acoustic waves under conservation of energy and linear momentum |
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