Weiler, Mathias and Aqeel, Aisha and Mostovoy, Maxim and Leonov, Andrey and Gepraegs, Stephan and Gross, Rudolf and Huebl, Hans and Palstra, Thomas T. M. and Goennenwein, Sebastian T. B. (2017) Helimagnon Resonances in an Intrinsic Chiral Magnonic Crystal. PHYSICAL REVIEW LETTERS, 119 (23): 237204. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
We experimentally study magnetic resonances in the helical and conical magnetic phases of the chiral magnetic insulator Cu2OSeO3 at the temperature T = 5 K. Using a broadband microwave spectroscopy technique based on vector network analysis, we identify three distinct sets of helimagnon resonances in the frequency range 2 GHz <= f <= 20 GHz with low magnetic damping alpha <= 0.003. The extracted resonance frequencies are in accordance with calculations of the helimagnon band structure found in an intrinsic chiral magnonic crystal. The periodic modulation of the equilibrium spin direction that leads to the formation of the magnonic crystal is a direct consequence of the chiral magnetic ordering caused by the Dzyaloshinskii-Moriya interaction. The mode coupling in the magnonic crystal allows excitation of helimagnons with wave vectors that are multiples of the spiral wave vector.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FERROMAGNETIC-RESONANCE; MAGNETOSTATIC MODES; MAGNETIC SKYRMIONS; SPIN-WAVES; SPHEROIDS; DYNAMICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Jascha Repp |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:18 |
| Last Modified: | 21 Mar 2019 16:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1700 |
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