Low dielectric loss and narrow FMR linewidth of Ca-Ge co-substituted YInIG ferrites for microwave device application

Gao, Feng; Su, Haokai; Sun, Yang; Yang, Yan; Wang, Gang; Han, Xuening; Li, Qiang

doi:10.1016/j.jallcom.2021.160965

Cited by 16 publications

(4 citation statements)

References 24 publications

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“…Thus, the reduction in ΔH was due to an enhancement of 4πMs and an increase in porosity. The results imply that the reduction in small grains can enhance the uniformity of ferrite grains and lower ΔH via appropriate CuO substitution [19,20]. The ΔH is a macroscopic physical quantity that reflects the damping experienced by the magnetization during its precession.…”

Section: Gyromagnetic Propertiesmentioning

confidence: 90%

Effect of Bi2O3–CuO Flux on the Microstructure, Soft Magnetic Properties, and Gyromagnetic Properties of NiCuZn Ferrites for LTCC Devices

Lu,

Zhang

2024

Micromachines

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In this work, the electromagnetic properties of Ni0.22Cu0.31Zn0.47Fe2O4 (NiCuZn) ferrites doped with 0.3 wt% Bi2O3 + xCuO flux (x = 0.2, 0.4, 0.6, and 0.8 wt%) were studied. Doping resulted in a reduction in the sintering temperature to 900 °C. The doped ferrites were synthesized via the solid-state method. XRD patterns revealed that the prepared ferrites had a cubic spinel structure; thus, a moderate addition of flux did not change the crystal structure. The SEM images, as well as the density and grain size distribution of the samples, showed that the NiCuZn ferrites had densified, homogenized, and contained fully grown grains for x = 0.6 wt%. The sample exhibited good soft magnetic properties, with μ′ reaching the maximum value of 245.4 for x = 0.6 wt% and ε′, Ms, and Hc reaching the maximum values of 23.1, 28.06 emu/g, and 45.86 Oe for x = 0.8 wt%, respectively. Furthermore, the ferrites exhibited good gyromagnetic properties, with 4πMs reaching the maximum value of 1744 Gauss for x = 0.8 wt% and ΔH reaching the minimum value of 228 Oe for x = 0.6 wt%. NiCuZn ferrites were successfully sintered at a lower temperature (900 °C) by adding Bi2O3–CuO flux through LTCC technology and exhibited good soft magnetic properties and gyromagnetic properties. We envisage that these ferrites could be used in multilayer devices.

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Section: Gyromagnetic Propertiesmentioning

confidence: 90%

Effect of Bi2O3–CuO Flux on the Microstructure, Soft Magnetic Properties, and Gyromagnetic Properties of NiCuZn Ferrites for LTCC Devices

Lu,

Zhang

2024

Micromachines

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“…𝛼 1∕2 = 𝛼 0 + 10log 10 2 − 10log 10 (10 (𝛼 𝑟 −𝛼 0 )∕10 + 1), (10) Δ𝐻 𝑎 = 2.07 𝐾 2 1 (𝜇 2 0 𝑀 3 𝑆 ) 𝐺(𝜔, 𝜔 𝑖 ), 𝑎𝑛𝑑…”

Section: Microwave Magnetic Lossmentioning

confidence: 99%

“…To study the magnetic properties of YIG ferrite affected by ion doping, Gao et al. doped Ca 2+ and Ge 4+ in YIG prepared via the conventional solid‐phase reaction and discovered that an appropriate amount of doping can help reduce microwave magnetic loss 10 . Torres et al.…”

Section: Introductionmentioning

confidence: 99%

“…To study the magnetic properties of YIG ferrite affected by ion doping, Gao et al doped Ca 2+ and Ge 4+ in YIG prepared via the conventional solid-phase reaction and discovered that an appropriate amount of doping can help reduce microwave magnetic loss. 10 Torres et al doped Sn 4+ in Y 3 Fe 5−x Sn x O 12 (x = 0−1) and discovered that Sn 4+ entered two types of iron-ion occupancies (tetrahedral and octahedral sites). 11 The variation in the net magnetic moment in Zn-doped YIG was studied, and it was discovered that the subferromagnetic coupling increases with a decrease in Zn doping.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric and gyromagnetic structure modulations of Zn–Sn codoped yttrium–iron–garnet based on the density‐generalized functional theory and P–V–L bond theory

et al. 2023

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Herein, the crystal structure, dielectric properties, and gyromagnetic characteristics of Zn–Sn codoped Y3ZnxSnxFe5−2xO12 (x = 0.0–0.5) prepared using a conventional ceramic process were investigated. According to the first‐principles’ calculations and complex crystal bonding theory, Zn2+–Sn4+ codoping can increase the relative dielectric constant (εr) by enhancing the average ionicity. The x‐ray photoelectron spectroscopy (XPS) and Raman analysis results indicate that an appropriate amount of Zn2+–Sn4+ codoping can help improve the microscopic morphology, maintain the appropriate ratio of divalent iron ions, and reduce the microwave magnetic and electrical losses of YIG ferrites. The optimized microwave properties are as follows. Y3Zn0.3Sn0.3Fe4.4O12 after sintering at 1400°C; εr = 15.6; dielectric loss, that is, tanδε = 4.3 × 10−4; saturation magnetization, that is, 4πMS = 2244 G; ferromagnetic resonance linewidth, that is, ΔH = 37 Oe. These properties can help improve the performance of high‐frequency microwave components by enhancing the properties of ferrite.

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High Dielectric Constant YIG Ferrites with Low Sintering Temperature

Peng

et al. 2022

J Mater Sci: Mater Electron

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Low dielectric loss and narrow FMR linewidth of Ca-Ge co-substituted YInIG ferrites for microwave device application

Cited by 16 publications

References 24 publications

Effect of Bi2O3–CuO Flux on the Microstructure, Soft Magnetic Properties, and Gyromagnetic Properties of NiCuZn Ferrites for LTCC Devices

Effect of Bi2O3–CuO Flux on the Microstructure, Soft Magnetic Properties, and Gyromagnetic Properties of NiCuZn Ferrites for LTCC Devices

Dielectric and gyromagnetic structure modulations of Zn–Sn codoped yttrium–iron–garnet based on the density‐generalized functional theory and P–V–L bond theory

High Dielectric Constant YIG Ferrites with Low Sintering Temperature

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