Magnetic and FTIR studies of BixY3−xFe5O12 (x=0, 1, 2) powders prepared by the metal organic decomposition method

Lee, Hanju; Yoon, Youngwoon; Yoo, Hyung-Keun; Choi, Sul A; Kim, Kyoungchul; Choi, Yong; Melikyan, Harutyun; Ishibashi, Takayuki; Friedman, Barry

doi:10.1016/j.jallcom.2011.07.005

Cited by 29 publications

(16 citation statements)

References 34 publications

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“…The magnetic hysteresis loops possess improved squareness (Sq = M r / M s ). The magnetic remanence ( M r ), saturation magnetization, and coercivity field are about 10% lower, 25% higher, and 50% lower than reported by others, respectively …”

Section: Resultscontrasting

confidence: 56%

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Iron‐depleted Bi‐YIG having enhanced gyromagnetic properties suitable for LTCC processing

2018

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The traditional method of ferrite synthesis is based upon solid‐state reaction. The advantages of this approach include simplicity, cost effectiveness, and suitability for commercial process scaling. However, there exist shortcomings in that impurities and defects adversely affect magnetic properties. Here, iron‐depleted compositions of bismuth‐substituted yttrium iron garnet (ie Bi:YIG) were studied with emphasis placed on the impact of synthesis processing parameters upon the structure and gyromagnetic properties. It was shown that ferrimagnetic resonance linewidth experienced a minimum of 180.3 Oe (X‐band) when the sample stoichiometry was 4% depleted in iron (x = 0.2), a reduction of 29.3% from the parent compound. Concomitantly, iron depletion caused a systematic change in lattice parameter that resulted in a dilation of Goodenough‐Kanamori‐Anderson bond angles increasing exchange energy and magnetization. The substitution of Bi for Y on the dodecahedron sites altered the reaction path and decreased the activation energy effectively reducing sintering temperature. To establish a functional processing protocol, an ion diffusion model is presented to explain the demonstrated processing, structure, and performance paradigm.

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Section: Resultscontrasting

confidence: 56%

“…Many past works have shown that the substitution of yttrium by bismuth, near the ratio of 0.9 (ie, Y 2.1 Bi 0.9 Fe 5 O 12 ), reduces the sintering temperature …”

Section: Introductionmentioning

confidence: 99%

Iron‐depleted Bi‐YIG having enhanced gyromagnetic properties suitable for LTCC processing

2018

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“…In majority of the publications, the effect of the annealing temperature and duration of doped YIG powders has been investigated on the physical and magnetic properties. It is shown that at higher temperatures, the observed physical and magnetic properties of garnet are similar to that of solid state reaction techniques [10].…”

Section: Introductionsupporting

confidence: 54%

Structural and magnetic study of metallo-organic YIG powder using 2-ethylhexanoate carboxylate-based precursors

et al. 2019

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The crystallization and magnetic behavior of yttrium iron garnet (YIG) prepared by metalloorganic decomposition (MOD) method are discussed. The chemistry and physics related to synthesis of iron and yttrium carboxylates based on 2-ethylhexanoic acid (2EHA) are studied, since no literature was found which elucidates synthesis of metallo-organic precursor of YIG in spite of the literatures of doped YIG samples such as Bi-YIG. Typically, the metal carboxylates used in preparation of ceramic oxide materials are 2-ethylhexanoate (2EH) solvents. Herein, the synthesis, thermal behavior and solubility of yttrium and iron 2EH used in synthesis of YIG powder by MOD are reported. The crystallization and magnetic parameters, including saturation magnetization and coercivity of these samples, smoothly change as a function of the annealing temperature. It is observed that high sintering temperature of 1300 to 1400 °C promotes the diffraction peaks of YIG, therefore, we can conclude that the formation of YIG in MOD method increases the crystallization temperature. The maximum value of saturation magnetization and minimum value of coercivity and remanence are observed for the sample sintered at 1200°C which are 13.7 emu/g, 10.38 Oe and 1.5 emu/g, respectively. This study cites the drawbacks in chemical synthesis of metallo-organic based YIG production. 2

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“…These residual phases may be formed due to insufficient sintering time or temperature. The proposed crystallization process can be described by following reactions [35,36]:…”

Section: Characterization Of the Samplesmentioning

confidence: 99%

High saturation magnetization, low coercivity and fine YIG nanoparticles prepared by modifying co-precipitation method

Hosseinzadeh

Behboudnia

Jamilpanah

et al. 2019

Journal of Magnetism and Magnetic Materials

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Nanoparticles with their specific properties newly have drawn a great deal of attention of researchers [1-3]Yttrium iron Garnet magnetic nanoparticles (YIG-NPs) are promising materials with novel applications in microwave, spintronics, magnonics, and magneto-optical devices.However, achieving stable and remarkable magnetic YIG-NPs has been remaining as a great challenge. In this paper, synthesized YIG-NPs by modifying co-precipitation (MCP) method is reported. Structural and magnetic properties of final products are compared to those of the materials prepared by citrate-nitrate (CN) method. Smaller crystals and particle size have been found by MCP method comparing to that of synthesized by CN method. Using a relatively low annealing temperatures for both sets of samples (~700 °C), the final YIG samples prepared by MCP method show more structural purity than those made by CN method. Higher saturation magnetization (M s ) and lower coercivity (H c ) are observed in MCP YIG sample (23.23 emu/g and 30.1 Oe) than the CN prepared YIG sample (16.43 emu/g and 44.95 Oe). The Curie temperature is measured to be 569 °C for the MCP YIG sample determined from set of M s measurement at different temperatures ranging from 80-600 K. These findings lead to significant improvement in quality of synthesized (synthetic methods) of YIG-NPs.

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Magnetic and FTIR studies of BixY3−xFe5O12 (x=0, 1, 2) powders prepared by the metal organic decomposition method

Cited by 29 publications

References 34 publications

Iron‐depleted Bi‐YIG having enhanced gyromagnetic properties suitable for LTCC processing

Iron‐depleted Bi‐YIG having enhanced gyromagnetic properties suitable for LTCC processing

Structural and magnetic study of metallo-organic YIG powder using 2-ethylhexanoate carboxylate-based precursors

High saturation magnetization, low coercivity and fine YIG nanoparticles prepared by modifying co-precipitation method

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