Magneto-dielectric composite based on Y3Fe5O12 – CaTiO3 for radio frequency and microwave applications

Paiva, D.V.M.; Silva, M. A. S.; Oliveira, R. G. M.; Rodrigues, Alisson Mendes; Sombra, A. S. B.; Fechine, Pierre Basílio Almeida

doi:10.1016/j.jallcom.2018.12.366

Cited by 23 publications

(3 citation statements)

References 33 publications

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“…Although all compositions showed a low dielectric loss, which is required for some applications [5]. [60]. The FMO and FMO-7.5 bulks showed τ f values of -6.55 and -4.35 ppm.°C -1 , respectively.…”

Section: Resultsmentioning

confidence: 96%

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Araújo¹,

Silva²,

Pereira³

et al. 2020

Preprint

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Molybdates from A2Mo3O12 family have been widely investigated due to its low sintering temperature, low thermal expansion coefficient, and low dielectric loss. Fe2Mo3O12 (FMO) is an oxide from this family and widely used in the catalytic field. The aim of this work is to evaluate the influence of the Bi2O3-B2O3 as a sintering aid in the microstructure and dielectric properties of FMO. The diffraction results showed that the FMO with the monoclinic structure phase was obtained after the calcination process (650 °C). Mössbauer spectroscopy showed the formation of Fe2O3 after the sintering process at 800 °C. The scanning electron-microscopic demonstrates an increase of the grain as a function of sintering aid concentration. The samples were analyzed by using the impedance spectroscopy at radiofrequency with temperature variation. The Nyquist diagram obtained in this temperature range was fitted from an equivalent circuit with three R-CPE associations, corresponding to the morphology of the electroceramics. For dielectric properties in the microwave, all the samples showed values of εr lower than 10. Values of Q x f above 14132.35 GHz were achieved. The thermal stability was evaluated by the temperature coefficient of resonant frequency (τf). The lowest τf values of -6.55 ppm/°C and -4.35 ppm/°C (near-zero) were measured to FMO and FMO mixed with 7.5 wt% Bi2O3-B2O3, respectively. Based on these results, FMO can be used to low permittivity ceramic for low temperature co-fired ceramics (LTCC) applications, antenna substrate, and millimeter-wave range.

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Section: Resultsmentioning

confidence: 96%

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Araújo¹,

Silva²,

Pereira³

et al. 2020

Preprint

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“…A lower damping factor can broaden the operating frequency band and a narrower FMR line width can increase the transmission distance. Rare earth iron garnet (RIG) films [especially yttrium iron garnet (Y 3 Fe 5 O 12 , YIG) films] with a nearly intrinsic FMR line width have played a significant role in microwave (Paiva et al, 2019;Hasan et al, 2017;Grant et al, 1974), spintronic (Chumak et al, 2015;Wang et al, 2018;Pirro et al, 2014) and magnetic-optic devices (Shoji et al, 2008), such as microwave resonators, filters, oscillators and isolators.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of Y₃(GaAlFe)₅O₁₂ liquid-phase epitaxy films with low ferromagnetic resonance losses

Zhang

Liu

et al. 2023

Acta Crystallogr Sect B

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Ultra-thin rare earth iron garnet (RIG) films with a narrow ferromagnetic resonance (FMR) line width and a low damping factor have attracted a great deal of attention for microwave and spintronic applications. In this work, 200 nm Y3(GaAlFe)5O12 garnet (GaAl-YIG) films were prepared on gadolinium gallium garnet (GGG) substrates by liquid-phase epitaxy (LPE) with low saturation magnetization. The microstructural properties, chemical composition, and magnetostatic and dynamic magnetization characteristics of the films are discussed in detail. According to the structural analysis, these films exhibit a low surface roughness of less than 0.5 nm. The GaAl-YIG films show an obvious temperature dependence of lattice parameter and strain state, and the film's parameter is perfectly matched with that of the GGG substrate at 810°C. There is a clear variation in the Pb level, which brings about a gradual enhancement of the coercivity and a diminution of the squareness ratio of magnetic hysteresis loops as the growth temperature is reduced. Slight changes in surface roughness, strain condition and content of Pb induce the FMR line width and damping factor to vary on a small scale. The line width is less than 10.17 Oe at 12 GHz and the damping factor is of the order of 10−4. All these properties demonstrate that these ultra-thin GaAl-YIG films are of benefit for the development of devices operated at lower frequencies and in lower fields.

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“…Recently, the need for miniaturization and reduction of the operating J o u r n a l P r e -p r o o f frequency has encouraged the use of materials with higher permittivity ('  60) and losses typically around (tan  10 -2 -10 -3 ) in order to preserve an acceptable DRA gain and efficiency. This concerns ferroelectric materials such as Ba(Ti 1-x Fe x )O 3-x/2 [19], Sr(Zr x Ti 1-x )O 3 [20] or ferroelectric composite materials such as Y 3 Fe 5 O 12 /CaTiO 3 [21] and CaTiO 3 -BiVO 4 [22].…”

Section: Introductionmentioning

confidence: 99%

Perovskite (Sr2Ta2O7)100−x(La2Ti2O7)x ceramics: From dielectric characterization to dielectric resonator antenna applications

Haydoura

Benzerga

Paven

et al. 2021

Journal of Alloys and Compounds

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In this paper, ferroelectric ceramics with (Sr 2 Ta 2 O 7 ) 100-x (La 2 Ti 2 O 7 ) x (STLTO) compositions have been investigated and their dielectric properties have been characterized in wide frequency band (from few kHz to few GHz); their integration in Dielectric Resonator Antennas (DRA) was conducted. The dense STLTO ceramics have been obtained by high temperature sintering of powders synthetized by solid state chemistry route. STLTO crystalline cell parameters and volume vary linearly as a function of the chemical composition (x) thus demonstrating an ideal solid solution domain for 0 ≤ x ≤ 3. Dielectric characterizations highlight that the permittivity and the dielectric loss vary according to the composition (x) and that the lowest losses are obtained for x < 1.65 compositions. The latter corresponds to the transition between the ferroelectric and paraelectric compositions of the STLTO material at room temperature. A low profile DRA structure was realized using a cylindrical paraelectric STLTO resonator (with x = 0

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Magneto-dielectric composite based on Y3Fe5O12 – CaTiO3 for radio frequency and microwave applications

Cited by 23 publications

References 33 publications

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Structural and magnetic properties of Y₃(GaAlFe)₅O₁₂ liquid-phase epitaxy films with low ferromagnetic resonance losses

Perovskite (Sr2Ta2O7)100−x(La2Ti2O7)x ceramics: From dielectric characterization to dielectric resonator antenna applications

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Magneto-dielectric composite based on Y3Fe5O12 – CaTiO3 for radio frequency and microwave applications

Cited by 23 publications

References 33 publications

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Effect of Bi2O3-B2O3 as a Sintering aid in Microstructure and Dielectric Properties of Fe2Mo3O12 Electroceramic.

Structural and magnetic properties of Y3(GaAlFe)5O12 liquid-phase epitaxy films with low ferromagnetic resonance losses

Perovskite (Sr2Ta2O7)100−x(La2Ti2O7)x ceramics: From dielectric characterization to dielectric resonator antenna applications

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Product

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Structural and magnetic properties of Y₃(GaAlFe)₅O₁₂ liquid-phase epitaxy films with low ferromagnetic resonance losses