Study on high-frequency 3-D magnetization precession modes of circular magnetic nano-dots using coplanar wave guide vector network analyzer ferromagnetic resonance

Kousaku Miyake; Seung Mo Noh; Tomoaki Kaneko; Hiroshi Imamura; Masashi Sahashi

doi:10.1109/TMAG.2012.2188134

Study on high-frequency 3-D magnetization precession modes of circular magnetic nano-dots using coplanar wave guide vector network analyzer ferromagnetic resonance

Kousaku Miyake, Seung Mo Noh, Tomoaki Kaneko, Hiroshi Imamura, Masashi Sahashi

ENG - Electronic Engineering

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

6 Citations (Scopus)

Abstract

Ferromagnetic resonance (FMR) modes for Fe₇₀Co₃₀ magnetic nano-dots of 100 nm in diameter in a mono-domain state are studied under different in-plane and out-of-plane magnetic fields using a reflection measurement from a vector network analyzer with a coplanar wave guide (CPW VNA FMR) and a micromagnetics simulation. The observed real and imaginary parts of the reflection signal become a combination of symmetric and antisymmetric Lorentzian forms in FMR. The combinations are given different susceptibility components of χ_xx and χ_zx by changing the sample position on the CPW. The magnetic dots exhibit triple modes in FMR spectra from an influence of the demagnetization field distribution in the mono-domain state. The magnetic dots also show a different variation of FMR amplitude in χ_xx and χ_zx for an out-of-plane field increase.

Original language	English
Article number	6187790
Pages (from-to)	1782-1788
Number of pages	7
Journal	IEEE Transactions on Magnetics
Volume	48
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/TMAG.2012.2188134
Publication status	Published - 2012 May

Keywords

Ferromagnetic resonance
magnetic nano-dots
micromagnetics simulation
microwave assisted magnetic recording

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2012.2188134

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Study on high-frequency 3-D magnetization precession modes of circular magnetic nano-dots using coplanar wave guide vector network analyzer ferromagnetic resonance. / Miyake, Kousaku; Noh, Seung Mo; Kaneko, Tomoaki et al.
In: IEEE Transactions on Magnetics, Vol. 48, No. 5 PART 1, 6187790, 05.2012, p. 1782-1788.

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

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title = "Study on high-frequency 3-D magnetization precession modes of circular magnetic nano-dots using coplanar wave guide vector network analyzer ferromagnetic resonance",

abstract = "Ferromagnetic resonance (FMR) modes for Fe70Co30 magnetic nano-dots of 100 nm in diameter in a mono-domain state are studied under different in-plane and out-of-plane magnetic fields using a reflection measurement from a vector network analyzer with a coplanar wave guide (CPW VNA FMR) and a micromagnetics simulation. The observed real and imaginary parts of the reflection signal become a combination of symmetric and antisymmetric Lorentzian forms in FMR. The combinations are given different susceptibility components of χxx and χzx by changing the sample position on the CPW. The magnetic dots exhibit triple modes in FMR spectra from an influence of the demagnetization field distribution in the mono-domain state. The magnetic dots also show a different variation of FMR amplitude in χxx and χzx for an out-of-plane field increase.",

keywords = "Ferromagnetic resonance, magnetic nano-dots, micromagnetics simulation, microwave assisted magnetic recording",

author = "Kousaku Miyake and Noh, {Seung Mo} and Tomoaki Kaneko and Hiroshi Imamura and Masashi Sahashi",

note = "Funding Information: This work was partially supported by Storage Research Consortiums (SRC) and a NEDO grant.",

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AU - Miyake, Kousaku

AU - Noh, Seung Mo

AU - Kaneko, Tomoaki

AU - Imamura, Hiroshi

AU - Sahashi, Masashi

N1 - Funding Information: This work was partially supported by Storage Research Consortiums (SRC) and a NEDO grant.

PY - 2012/5

Y1 - 2012/5

N2 - Ferromagnetic resonance (FMR) modes for Fe70Co30 magnetic nano-dots of 100 nm in diameter in a mono-domain state are studied under different in-plane and out-of-plane magnetic fields using a reflection measurement from a vector network analyzer with a coplanar wave guide (CPW VNA FMR) and a micromagnetics simulation. The observed real and imaginary parts of the reflection signal become a combination of symmetric and antisymmetric Lorentzian forms in FMR. The combinations are given different susceptibility components of χxx and χzx by changing the sample position on the CPW. The magnetic dots exhibit triple modes in FMR spectra from an influence of the demagnetization field distribution in the mono-domain state. The magnetic dots also show a different variation of FMR amplitude in χxx and χzx for an out-of-plane field increase.

AB - Ferromagnetic resonance (FMR) modes for Fe70Co30 magnetic nano-dots of 100 nm in diameter in a mono-domain state are studied under different in-plane and out-of-plane magnetic fields using a reflection measurement from a vector network analyzer with a coplanar wave guide (CPW VNA FMR) and a micromagnetics simulation. The observed real and imaginary parts of the reflection signal become a combination of symmetric and antisymmetric Lorentzian forms in FMR. The combinations are given different susceptibility components of χxx and χzx by changing the sample position on the CPW. The magnetic dots exhibit triple modes in FMR spectra from an influence of the demagnetization field distribution in the mono-domain state. The magnetic dots also show a different variation of FMR amplitude in χxx and χzx for an out-of-plane field increase.

KW - Ferromagnetic resonance

KW - magnetic nano-dots

KW - micromagnetics simulation

KW - microwave assisted magnetic recording

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Study on high-frequency 3-D magnetization precession modes of circular magnetic nano-dots using coplanar wave guide vector network analyzer ferromagnetic resonance

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Keywords

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