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Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields

Zhou, X.; Tartakovskaya, E.V.; Kakazei, G.N.; Adeyeye, A.O.

Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields Thumbnail


Authors

X. Zhou

E.V. Tartakovskaya

G.N. Kakazei



Abstract

Control of the spin wave dynamics in nanomagnetic elements is very important for the realization of a broad range of novel magnonic devices. Here we study experimentally the spin wave resonance in thick ferromagnetic rings (100 nm) using perpendicular ferromagnetic resonance spectroscopy. Different from what was observed for the continuous film of the same thickness, or from rings with similar lateral dimensions but with lower thicknesses, the spectra of thick patterned rings show a nonmonotonic dependence of the mode intensity on the resonance field for a fixed frequency. To explain this effect, the theoretical approach by considering the dependence of the mode profiles on both the radial and axial coordinates was developed. It was demonstrated that such unusual behavior is a result of the competition between exchange and dipolar fields acting at the spin excitations in the structure under study. The calculations are in a good agreement with the experimental results.

Citation

Zhou, X., Tartakovskaya, E., Kakazei, G., & Adeyeye, A. (2021). Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields. Physical Review B, 104(21), Article 214402. https://doi.org/10.1103/physrevb.104.214402

Journal Article Type Article
Acceptance Date Nov 17, 2021
Online Publication Date Dec 3, 2021
Publication Date 2021-12
Deposit Date Dec 3, 2021
Publicly Available Date Mar 17, 2022
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 2469-9969
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 104
Issue 21
Article Number 214402
DOI https://doi.org/10.1103/physrevb.104.214402

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Copyright Statement
Reprinted with permission from the American Physical Society: Zhou, X., Tartakovskaya, E. V., Kakazei, G. N. & Adeyeye, A. O. (2021). Engineering spin wave spectra in thick Ni80Fe20 rings by using competition between exchange and dipolar fields. Physical Review B 104(21): 214402. © (2021) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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