Spin dynamics in ferromagnetic resonance for nano-sized magnetic dot arrays: Metrology and insight into magnetization dynamics

Seungmo Noh; Daisuke Monma; Kousaku Miyake; Masaaki Doi; Tomoaki Kaneko; Hiroshi Imamura; Masashi Sahashi

doi:10.1109/TMAG.2011.2150741

Spin dynamics in ferromagnetic resonance for nano-sized magnetic dot arrays: Metrology and insight into magnetization dynamics

Seungmo Noh, Daisuke Monma, Kousaku Miyake, Masaaki Doi, Tomoaki Kaneko, Hiroshi Imamura, Masashi Sahashi

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The ferromagnetic resonance response (FMR) in the variously sized magnetic dot arrays was measured by using network-analyzer ferromagnetic resonance technique. We first demonstrated that the magnetization excitation related to the susceptibility χ_zx by the coplanar wave-guide (CPW). In this χ_zx, the edge mode excitation modified the FMR response appreciably and found that the damping constant is strongly affected by the size of the nano-magnet. In larger nano-magnets, two edge modes were observed. We showed that this edge mode can be exploited as a means to separately characterize the magnetization state of the nano-magnet as well as the size variation. In addition, the simulation results are also presented here to account for the experimental observations.

Original language	English
Article number	6027760
Pages (from-to)	2387-2390
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2150741
Publication status	Published - 2011 Oct 1

Keywords

Coplanar waveguide (CPW)
damping constant
magnetic dot array
magnetization dynamics
network analyzer ferromagnetic resonance (NA-FMR)
rf magnetic susceptibility

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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Spin dynamics in ferromagnetic resonance for nano-sized magnetic dot arrays : Metrology and insight into magnetization dynamics. / Noh, Seungmo; Monma, Daisuke; Miyake, Kousaku; Doi, Masaaki; Kaneko, Tomoaki; Imamura, Hiroshi; Sahashi, Masashi.

In: IEEE Transactions on Magnetics, Vol. 47, No. 10, 6027760, 01.10.2011, p. 2387-2390.

Research output: Contribution to journal › Article › peer-review

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abstract = "The ferromagnetic resonance response (FMR) in the variously sized magnetic dot arrays was measured by using network-analyzer ferromagnetic resonance technique. We first demonstrated that the magnetization excitation related to the susceptibility χzx by the coplanar wave-guide (CPW). In this χzx, the edge mode excitation modified the FMR response appreciably and found that the damping constant is strongly affected by the size of the nano-magnet. In larger nano-magnets, two edge modes were observed. We showed that this edge mode can be exploited as a means to separately characterize the magnetization state of the nano-magnet as well as the size variation. In addition, the simulation results are also presented here to account for the experimental observations.",

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AU - Kaneko, Tomoaki

AU - Imamura, Hiroshi

AU - Sahashi, Masashi

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