Magnetization dynamics of single and trilayer permalloy nanodots

Kuchibhotla, Mahathi; Talapatra, Abhishek; Haldar, Arabinda; Adeyeye, Adekunle Olusola

doi:10.1063/5.0060689

Magnetization dynamics of single and trilayer permalloy nanodots

Kuchibhotla, Mahathi; Talapatra, Abhishek; Haldar, Arabinda; Adeyeye, Adekunle Olusola

Authors

Mahathi Kuchibhotla

Abhishek Talapatra

Arabinda Haldar

Professor Adekunle Adeyeye adekunle.o.adeyeye@durham.ac.uk
Head of College

Abstract

We have investigated the magnetization dynamics in single and trilayer circular permalloy nanodots with a diameter of 120 nm using broadband ferromagnetic resonance spectroscopy. For single-layer nanodots, two well-separated modes near the saturation field, a high-frequency center mode due to excitations at the center of the nanodots and a low-frequency edge mode due to the inhomogeneous effective field near the edges, were observed. Both the center mode and the edge mode are found to be sensitive to the thickness of the nanodots. However, for trilayer nanodots, two center modes arise due to the in-phase and out-of-phase precession of spins in magneto-dynamically coupled layers. Our experimental results are substantiated by micromagnetic simulations, which are in good agreement.

Citation

Kuchibhotla, M., Talapatra, A., Haldar, A., & Adeyeye, A. O. (2021). Magnetization dynamics of single and trilayer permalloy nanodots. Journal of Applied Physics, 130(8), Article 083906. https://doi.org/10.1063/5.0060689

Journal Article Type	Article
Acceptance Date	Aug 9, 2021
Online Publication Date	Aug 30, 2021
Publication Date	Aug 28, 2021
Deposit Date	Sep 1, 2021
Publicly Available Date	Sep 1, 2021
Journal	Journal of Applied Physics
Print ISSN	0021-8979
Electronic ISSN	1089-7550
Publisher	American Institute of Physics
Peer Reviewed	Peer Reviewed
Volume	130
Issue	8
Article Number	083906
DOI	https://doi.org/10.1063/5.0060689

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics 130, 083906 (2021) and may be found at https://doi.org/10.1063/5.0060689.