Impact of Complex Permeability Measurements up to Millimeter-Wave Frequency Range

S. Yabukami; K. Nozawa; L. Tonthat; K. Okita; R. Sai

doi:10.1109/TMAG.2020.3011971

Impact of Complex Permeability Measurements up to Millimeter-Wave Frequency Range

S. Yabukami
, K. Nozawa
, L. Tonthat
, K. Okita
, R. Sai

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

Abstract

A highly sensitive microstrip-line-type probe using a flexible substrate was developed to measure thin-film permeability continuously up to the millimeter-wave frequency range (over 30 GHz). The probe enables broad bandwidth and highly sensitive permeability measurements without sample size limitations. The complex permeability of the CoFeB film (45 mm ×25 mm and 0.5μm in thickness), CoNbZr film (25 mm ×25 mm and 3 nm in thickness), and nickel ferrite film (8 mm ×5 mm, and 1.2μm in thickness) were optimized. The measured permeability spectrum and ferromagnetic resonance frequency showed good agreement with the theoretical values based on the Landau-Lifshitz-Gilbert equation and eddy current generation up to 67 GHz.

Original language	English
Article number	9149663
Journal	IEEE Transactions on Magnetics
Volume	57
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2020.3011971
Publication status	Published - Feb 2021
Externally published	Yes

Keywords

Complex permeability measurement
magnetic thin film
microstrip-line-type probe
millimeter-wave
sample size limitation

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10.1109/TMAG.2020.3011971

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title = "Impact of Complex Permeability Measurements up to Millimeter-Wave Frequency Range",

abstract = "A highly sensitive microstrip-line-type probe using a flexible substrate was developed to measure thin-film permeability continuously up to the millimeter-wave frequency range (over 30 GHz). The probe enables broad bandwidth and highly sensitive permeability measurements without sample size limitations. The complex permeability of the CoFeB film (45 mm ×25 mm and 0.5μm in thickness), CoNbZr film (25 mm ×25 mm and 3 nm in thickness), and nickel ferrite film (8 mm ×5 mm, and 1.2μm in thickness) were optimized. The measured permeability spectrum and ferromagnetic resonance frequency showed good agreement with the theoretical values based on the Landau-Lifshitz-Gilbert equation and eddy current generation up to 67 GHz.",

keywords = "Complex permeability measurement, magnetic thin film, microstrip-line-type probe, millimeter-wave, sample size limitation",

author = "S. Yabukami and K. Nozawa and L. Tonthat and K. Okita and R. Sai",

note = "Publisher Copyright: {\textcopyright} 1965-2012 IEEE.",

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doi = "10.1109/TMAG.2020.3011971",

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T1 - Impact of Complex Permeability Measurements up to Millimeter-Wave Frequency Range

AU - Yabukami, S.

AU - Nozawa, K.

AU - Tonthat, L.

AU - Okita, K.

AU - Sai, R.

PY - 2021/2

Y1 - 2021/2

N2 - A highly sensitive microstrip-line-type probe using a flexible substrate was developed to measure thin-film permeability continuously up to the millimeter-wave frequency range (over 30 GHz). The probe enables broad bandwidth and highly sensitive permeability measurements without sample size limitations. The complex permeability of the CoFeB film (45 mm ×25 mm and 0.5μm in thickness), CoNbZr film (25 mm ×25 mm and 3 nm in thickness), and nickel ferrite film (8 mm ×5 mm, and 1.2μm in thickness) were optimized. The measured permeability spectrum and ferromagnetic resonance frequency showed good agreement with the theoretical values based on the Landau-Lifshitz-Gilbert equation and eddy current generation up to 67 GHz.

AB - A highly sensitive microstrip-line-type probe using a flexible substrate was developed to measure thin-film permeability continuously up to the millimeter-wave frequency range (over 30 GHz). The probe enables broad bandwidth and highly sensitive permeability measurements without sample size limitations. The complex permeability of the CoFeB film (45 mm ×25 mm and 0.5μm in thickness), CoNbZr film (25 mm ×25 mm and 3 nm in thickness), and nickel ferrite film (8 mm ×5 mm, and 1.2μm in thickness) were optimized. The measured permeability spectrum and ferromagnetic resonance frequency showed good agreement with the theoretical values based on the Landau-Lifshitz-Gilbert equation and eddy current generation up to 67 GHz.

KW - Complex permeability measurement

KW - magnetic thin film

KW - microstrip-line-type probe

KW - millimeter-wave

KW - sample size limitation

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DO - 10.1109/TMAG.2020.3011971

M3 - Article

AN - SCOPUS:85098763156

SN - 0018-9464

VL - 57

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 2

M1 - 9149663

ER -

Impact of Complex Permeability Measurements up to Millimeter-Wave Frequency Range

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