Impact of Stoichiometry and Sintering Temperature on Magnetic Properties of Y3MnxAl0.83−xFe4.17O12 Ferrites

Huang, Ching-Chien; Hung, Yung-Hsiung; Huang, Jingyi; Kuo, Ming-Feng

doi:10.1109/tmag.2014.2310703

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…In the phase shifter, the SQR has a vital influence on signal switching. It has been noted that the Mn substitution of YIG is effective at increasing B r due to its smaller magnetostriction constant ( λ 111 ) . The smaller the λ 111 , the higher B r will be; thus, the SQR increases with the B r .…”

Section: Resultsmentioning

confidence: 99%

“…The smaller the λ 111 , the higher B r will be; thus, the SQR increases with the B r . The stoichiometry of (Y 3 )(Mn x Al 0.8‐ x Fe 4.2 )O 12 with x = 0.1 used in this study was chosen in order to achieve a high SQR . As shown in Figure , the SQR was upgraded because the increase rates of 4 πM s and B r were different.…”

Section: Resultsmentioning

confidence: 99%

“…The bistatic characteristics of the phase shifter render it an attractive component for application in phase‐array radar systems . For our study, the hysteresis characteristics of ferrite (eg, 4 πM s , approximately 650 Gauss, H c < 1.0 Oe, and SQR > 0.85) are required for S‐band phase shifter applications …”

Section: Introductionmentioning

confidence: 99%

“…Material composition is essential to the properties of garnet ferrite, because the chosen stoichiometry forcefully determines the magnetic properties of YIG ferrite . Mn, Al‐substituted YIG, which possesses a narrow ∆ H with a low H c at a relatively sufficient saturation magnetization (4 πM s) and SQR could be employed for latching‐type phase shifters at S‐band frequency ranges (3–5 GHz) . By substituting Mn and Al, the interaction between the sublattices of the YIG structure leads to a modification of their properties.…”

Section: Introductionmentioning

confidence: 99%

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Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

et al. 2018

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Yttrium iron garnet ferrite using the chosen stoichiometry of (Y3)(MnxAl0.8‐xFe4.2)O12 with x = 0.1 and different milling powder sizes were prepared through ball milling for various milling times to study the effect of powder size reduction on the resulting microstructural and magnetic properties. Sintered yttrium iron garnet ferrites were characterized by X‐ray diffraction analysis and scanning electron microscopy. The particle size (D50) of as‐milled calcined powder was decreased using ball milling (from 3.682 μm for a 0.5‐hour‐long milling to 1.606 μm for a 2.5‐hour‐long milling). Scanning electron microscopy analyses confirmed that the sintered grain exhibited a crystal size that was increased from initial values (average crystal grain sizes of 3.5 ± 0.1 μm for 0.5 hour of milling) up to 6.2 ± 0.1 μm after 2.5 hour of ball milling and the subsequent sintering process. The same sintered specimen after 2.5 hour of ball milling exhibited an obvious increase in saturation magnetization (4πMs), remanence (Br), and squareness ratio (namely Br/4πMs); it also caused a notable decline in coercivity (Hc) and ferromagnetic resonance line width (∆H), which were attributed to the introduction of a smaller size of calcined powder after milling and subsequently resulted in a larger sintered grain. Furthermore, a sufficient spin‐wave line width (∆Hk) and low insertion loss (|S21|) were obtained for the operation of the microwave device. The aforementioned results are all beneficial to the use of yttrium iron garnet ferrite in microwave applications. A correlation between the calcined powder size after milling, grain crystal size after sintering, and magnetic properties was evident in this study. The strict control of calcined powder size after milling is critical in tailoring suitable magnetic properties for yttrium iron garnet ferrite manufacturing processes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

et al. 2018

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“…Generally, reported studies involving sintering and materials properties employed multi-sample sintering scheme [3][4][5][6][7][8][9]. The multi-sample sintering has as many starting compacts as the number of the intended sintering temperatures where each sample sintered only once at different temperatures.…”

Section: Single-sample and Multi-sample Sinteringmentioning

confidence: 99%

Evolution of Magnetic Properties in Ferrites: Trends of Single- Sample and Multi-Sample Sintering

Ismail¹,

Ibrahim²,

Nazlan³

2018

Sintering of Functional Materials

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Microstructure of magnetic materials greatly influences the performance of magnetic properties, and sintering has been used as an agent to tailor the microstructure of these magnetic materials especially ferrites. Nanostructured ferrites prepared by high-energy milling method are often inherently unstable owing to their small constituent sizes, nonequilibrium cation distribution, disordered spin configuration, and high chemical activity. Therefore, sintering of the milled ferrites recrystallizes the nanostructure and causes its transition from an excited metastable (activated) state into the low-energy crystalline state. A better understanding of the response of nanoscale ferrites with changes in temperature is crucial not only for basic science (the development of an atomistic and microscopic theory of the mechanochemical processes) but also because of the technological high-temperature applications in catalysis, ferrofluids and information storage. This chapter discusses on two different sintering schemes, which are a commonly applied multi-sample sintering and a rarely adopted single-sample sintering. Experimental results of single-sample and multi-sample sintering of NiZn ferrites and yttrium iron garnet (YIG) were highlighted, and their microstructural consequences on the magnetic properties were also discussed.

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Influence of Temperature on Structural and Magnetic Properties of Gd₃Al_xFe₅₋_xO₁₂ (x = 2)

Sharma

Godara

Maji

et al. 2021

Crystal Research and Technology

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This research work explores the effect of sintering temperature on morphology and magnetic properties of aluminum substituted gadolinium iron garnet Gd 3 Al x Fe 5−x O 12 (x = 2). Sol-gel autocombustion method is adopted to prepare Gd 3 Al x Fe 5−x O 12 , and further sintered at 900, 1000, and 1100 °C. X-ray diffraction (XRD) confirms the formation of garnet phase structure. Fourier transformation infrared ray further stands with result of XRD that reveals the presence of garnet phase. Field emission scanning microscope analysis shows the formation of average grain size 4, 6, and 13 nm for 900, 1000, and 1100 °C, respectively. Vibrating sample magnetometer results show that the coercivity decreases with increases in temperature, which indicates that this material can be used in switching devices. The calculated value of microwave operating frequency reveals that these materials can be used in ultrahigh-frequency region.

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Impact of Stoichiometry and Sintering Temperature on Magnetic Properties of Y₃Mn_xAl_0.83−xFe_4.17O₁₂ Ferrites

Cited by 5 publications

References 10 publications

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

Evolution of Magnetic Properties in Ferrites: Trends of Single- Sample and Multi-Sample Sintering

Influence of Temperature on Structural and Magnetic Properties of Gd₃Al_xFe₅₋_xO₁₂ (x = 2)

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Impact of Stoichiometry and Sintering Temperature on Magnetic Properties of Y3MnxAl0.83−xFe4.17O12 Ferrites

Cited by 5 publications

References 10 publications

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y3MnxAl0.8‐xFe4.2O12 ferrites

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y3MnxAl0.8‐xFe4.2O12 ferrites

Evolution of Magnetic Properties in Ferrites: Trends of Single- Sample and Multi-Sample Sintering

Influence of Temperature on Structural and Magnetic Properties of Gd3AlxFe5−xO12 (x = 2)

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Product

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Impact of Stoichiometry and Sintering Temperature on Magnetic Properties of Y₃Mn_xAl_0.83−xFe_4.17O₁₂ Ferrites

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

Effect of particle size of as‐milled powders on microstructural and magnetic properties of Y₃Mn_xAl_0.8‐_xFe_4.2O₁₂ ferrites

Influence of Temperature on Structural and Magnetic Properties of Gd₃Al_xFe₅₋_xO₁₂ (x = 2)