Electromagnetic Wave Absorption Properties of BaFe12-x(Ti0.5M0.5)xO19 (M = Co, Ni, Zn, Mn, Cu)

克巳, 岡山; 博康, 太田; 好行, 吉田; 登志夫, 籠谷; 元, 中村; 諭, 杉本; 基文, 本間

doi:10.3379/jmsjmag.22.297

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The anisotropy field H A of M-type Ba ferrite is 1.36 MA/m which corresponds to a natural resonance frequency f r of 47.6 GHz. The H A has been reported to be changed by substituting certain elements for Fe 3+ in M-type hexagonal ferrite BaFe 12Àx (Ti 0.5 Mn 0.5 )O 19 , bringing about a shift in resonance frequency f r [1]. These samples exhibited the natural resonance with high m 0 and m 00 in the 1-20 GHz.…”

mentioning

confidence: 90%

Enhancement of GHz electromagnetic wave absorption characteristics in aligned M-type barium ferrite Ba1−La Zn Fe12−−(Me0.5Mn0.5) O19 (x=0.0–0.5; y=1.0–3.0, Me: Zr, Sn) by metal substitution

Kagotani

Fujiwara

Sugimoto

et al. 2004

Journal of Magnetism and Magnetic Materials

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confidence: 90%

Enhancement of GHz electromagnetic wave absorption characteristics in aligned M-type barium ferrite Ba1−La Zn Fe12−−(Me0.5Mn0.5) O19 (x=0.0–0.5; y=1.0–3.0, Me: Zr, Sn) by metal substitution

Kagotani

Fujiwara

Sugimoto

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…Magnetoplumbite-structured ferrites with a chemical formula of AFe 12 O 19 (A = alkali or alkaline-earth metal) are expected to have the f r value of ³50 GHz. [9][10][11][12] One of the magnetoplumbite-structured ferrites, i.e., an Sm-doped singlecrystal SrFe 12 O 19 , demonstrated an f r value of 53 GHz. 13 Due to the difficulties in sufficiently controlling the measurements in GHz-frequency electromagnetic waves, the FMR phenomena and permeability behaviors of magnetic materials in this frequency region are not yet well established, though the technological use of GHz-frequency electromagnetic waves is essential.…”

Section: Introductionmentioning

confidence: 99%

Creation of Materials Based on Novel Principles Utilizing an Interaction between Magnetism and Electromagnetic Waves —Dynamic Permeability of Magnetoplumbite-structured Ferrite with an In-plane Magnetic Anisotropy Through the Controlled-particle Orientations—

Yasukawa

Takahashi

2020

Electrochemistry

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We prepared a high-quality magnetic BaCoTiFe 10 O 19 ferrite-based composite sheet and BaCoTiFe 10 O 19 thin films exhibiting in-plane magnetic anisotropy. In-plane magnetic anisotropy was realized by controlling particle orientation to achieve high-resonance frequency values. The dynamic permeability of the samples in the GHz-frequency region was evaluated by the short-circuited microstripline method up to 30 GHz. Controlling the propagation of electromagnetic waves with GHz frequencies is extremely difficult. Nevertheless, the ferromagnetic resonance phenomena were observed, and the obtained sheet showed a resonance frequency value of approximately 4 GHz. However, the intrinsic ferromagnetic resonance behaviors were not elucidated for the thin films. The obtained BaCoTiFe 10 O 19 powder/ polymer composite sheet and BaCoTiFe 10 O 19 thin films may have the potential for use at GHz frequencies and as anisotropicelectromagnetic wave suppression materials.

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“…Because of structural characteristic, the Barium ferrite revealed the hard magnetic property. When the barium ferrite was used as a wave absorber, it showed the wave absorption range of K band of 47.6 GHz [3]. The wave absorption property caused by the magnetic properties of barium ferrite, the change of magnetic properties of the barium ferrite influenced the change of the wave absorption range of the barium ferrite [4].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Yang¹,

Kim²,

Jeong³

et al. 2019

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In this study, BaFe 12-2x Co x Ti x O 19 (X : 0 to 2.0, 0.2) powders were synthesized by sol-gel process. TG-DTA, XRD, SEM, VSM, and Network analyzer were measured in order to influence easy magnetization axis change on the wave absorption frequency range change. The easy magnetization axis change of the annealed powder at 900°C and 1200°C was confirmed by the coercive force decreased 4,800 and 3,870 Oe to 260 and 269 Oe, respectively, at the substitution ratio of 0.8 and 1.0. And it was confirmed that the change of the easy magnetization axis affected the change of the wave absorption frequency. The wave absorption frequency of substituted Barium Ferrite was less than 10 GHz range after the easy magnetization axis of Barium ferrite changed to a-b plan direction. It was confirmed the BaFe 12-2x Co x Ti x O 19 (x = 0.8 to 1.6) was synthesized by the sol-gel process and it was annealed at 900°C and 1200°C, which could be used as a wave absorber in the X-band region of 10 GHz less.

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Electromagnetic Wave Absorption Properties of BaFe12-x(Ti0.5M0.5)xO19 (M = Co, Ni, Zn, Mn, Cu)

Cited by 9 publications

References 2 publications

Enhancement of GHz electromagnetic wave absorption characteristics in aligned M-type barium ferrite Ba1−La Zn Fe12−−(Me0.5Mn0.5) O19 (x=0.0–0.5; y=1.0–3.0, Me: Zr, Sn) by metal substitution

Enhancement of GHz electromagnetic wave absorption characteristics in aligned M-type barium ferrite Ba1−La Zn Fe12−−(Me0.5Mn0.5) O19 (x=0.0–0.5; y=1.0–3.0, Me: Zr, Sn) by metal substitution

Creation of Materials Based on Novel Principles Utilizing an Interaction between Magnetism and Electromagnetic Waves —Dynamic Permeability of Magnetoplumbite-structured Ferrite with an In-plane Magnetic Anisotropy Through the Controlled-particle Orientations—

Archives of Metallurgy and Materials

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