On the synthesis and characterization of iron-containing garnets (Y3Fe5O12, YIG and Fe3Al5O12, IAG)

Garškaité, Edita; Gibson, Katharina; Leleckaite, Asta; Gläser, Jochen; Nižňanský, Daniel; Meyer, H.‐Jürgen

doi:10.1016/j.chemphys.2005.08.055

Cited by 85 publications

(50 citation statements)

References 23 publications

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“…The IR spectra of the CaWO 4 samples calcined at 800 • C contain broad and intensive bands at 850-750 cm −1 which can be assigned to the characteristic vibrations of WO 4 2− in scheelite [13,14]. In addition, there are weaker bands at ∼445 cm −1 , which probably could be assigned to the characteristic metaloxygen (Ca-O) vibrations [15]. Moreover, the IR spectra of calcium tungstate samples calcined at 800 • C do not show any bands attributable to carbonates or adsorbed water.…”

Section: Resultsmentioning

confidence: 99%

Sol-gel preparation of nanocrystalline CaWO₄

Katelnikovas¹

2007

Lithuanian J. Phys.

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Nanocrystalline CaWO4 has been synthesized by a sol-gel method using tungsten (VI) oxide, WO3, and calcium nitrate tetrahydrate, Ca(NO3)2·4H2O as starting materials. The synthesis leads to a sol-gel process when citric or tartaric acids are introduced into the solution obtained by dissolving WO3 in ammonia. Citric and tartaric acids have great effect on stabilizing the precursor solution. The results have shown that the single phase product was obtained when the gel was heat-treated at 800• C. The obtained CaWO4 particles ranged from 350 to 850 nm in size and showed emission in the blue region. CaWO4 ceramics has been characterized by means of thermogravimetric and differential thermal analysis (TG / DTA), infrared spectroscopy (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL).

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Section: Resultsmentioning

confidence: 99%

Sol-gel preparation of nanocrystalline CaWO₄

Katelnikovas¹

2007

Lithuanian J. Phys.

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“…The raw materials used for this sol-gel method are high purity (99.99%) yttrium nitrate, Y(NO 3 ) 3 Appropriate amount of yttrium nitrate and bismuth nitrate and were dissolved in an aqueous solution of citric acid. The nitrates were dissolved by stirring at 300 r.p.m at room temperature for 3 months to ensure homogeneous solution.…”

Section: Methodsmentioning

confidence: 99%

“…Extensive studies have been carried out on the synthesis of YIG nano-particles by coprecipitation technique. Due to the novel processing method, these oxides possess unique magnetic, magneto optical, thermal, electrical and mechanical properties such as excellent creep and radiation damage resistance, high thermal conductivity, high electrical resistivity, controllable saturation magnetization, moderate thermal expansion coefficient, energy transfer efficiency and narrow line width in ferromagnetic resonance [3]. Recently, YIG nanocrystals that were dispersed on glass have been investigated for high density magnetic or magneto-optical information storage [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Single Crystals Y3Fe5O12 and Bi3Fe5O12 Prepared via Sol Gel Technique

Yahya

Kozioł

Mansor

2009

DDF

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Abstract. Magnetic properties of nano-crystalline yttrium iron garnet, Y 3 Fe 5 O 12 and bismuth iron garnet, Bi 3 Fe 5 O 12 were studied. The samples were synthesized by using sol gel route. The gel were prepared using nitrates of yttrium and iron for the yttium iron garnet (YIG) and nitrates of bismuth and iron for the bismuth iron garnet (BIG). The raw materials were mixed and dissolved in citric acid and were stirred for 3 months in room temperature until the gel was observed. The X-ray diffraction pattern reveals the cubic structure of YIG and BIG samples at 700 0 C and 500 0 C respectively. From the M-H diagrams it was found that the YIG and BIG samples have saturation magnetization, Ms of 27.2 Gs with rectangular hysteresis loop and 24.4 Gs with S hysteresis loop, respectively. It is evident from the FESEM micrographs that the rectangular loop shape (YIG) arises from the homogeneous and rounded microstructure as compared to the inhomogenous and random orientation microstructure (BIG) of the samples. From the Electron diffraction done on Transmission Electron Microscope, both of the samples were shown to be single crystals. IntroductionMagnetic garnet, namely, yttrium iron garnet (Y 3 Fe 5 O 12 ) and bismuth iron garnet (Bi 3 Fe 5 O 12 ) that belongs to a group of magnetic oxides, is an attractive material for magneto-optical devices. They also have important applications within microwave frequencies, namely, optical isolators, oscillators, circulators and others, due to their large Faraday rotation and high saturation magnetization [1,2]. For these reasons, there are ongoing interests in investigating the chemical, physical and magnetic properties of these garnet materials. Extensive studies have been carried out on the synthesis of YIG nano-particles by coprecipitation technique. Due to the novel processing method, these oxides possess unique magnetic, magneto optical, thermal, electrical and mechanical properties such as excellent creep and radiation damage resistance, high thermal conductivity, high electrical resistivity, controllable saturation magnetization, moderate thermal expansion coefficient, energy transfer efficiency and narrow line width in ferromagnetic resonance [3]. Recently, YIG nanocrystals that were dispersed on glass have been investigated for high density magnetic or magneto-optical information storage [4].

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“…Their magnetic properties depend on the composi-tion (presence of magnetic ions), the crystal structure (the three-dimensional geometric arrangement of the ions) and temperature. These oxides have unique magnetic properties, magneto-optical, thermal, electrical and mechanical as well as ferrimagnetism, excellent resistance to radiation damage, high thermal conductivity, high electrical resistivity, controllable saturation magnetization and moderate thermal expansion coefficient [14][15][16]. Results about properties of the collagen/YIG biocomposite films were presented in previous studies [17].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

Mallmann¹,

Góes²,

Figueiró³

et al. 2011

Express Polym. Lett.

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Abstract. This work is devoted to the preparation of yttrium iron garnet (YIG) ferrimagnetic biocomposites based in biodegradable chitosan and gelatin. The aim was to produce composite films containing controlled amounts of YIG to obtain a new biological material with magneto-dielectric features. Structural characterization of the biocomposites was made by scanning electron microscopy, X-ray diffraction, infrared absorption spectroscopy and thermal analysis, while the dielectric and magnetic properties were obtained from dielectric spectroscopy and magnetic hysteresis loops, respectively. The versatility of the films obtained makes them possible candidates for use as biomaterials or electronic device.

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On the synthesis and characterization of iron-containing garnets (Y3Fe5O12, YIG and Fe3Al5O12, IAG)

Cited by 85 publications

References 23 publications

Sol-gel preparation of nanocrystalline CaWO₄

Sol-gel preparation of nanocrystalline CaWO₄

Synthesis and Characterization of Single Crystals Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> and Bi<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Prepared via Sol Gel Technique

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

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On the synthesis and characterization of iron-containing garnets (Y3Fe5O12, YIG and Fe3Al5O12, IAG)

Cited by 85 publications

References 23 publications

Sol-gel preparation of nanocrystalline CaWO4

Sol-gel preparation of nanocrystalline CaWO4

Synthesis and Characterization of Single Crystals Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> and Bi<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Prepared via Sol Gel Technique

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

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Sol-gel preparation of nanocrystalline CaWO₄

Sol-gel preparation of nanocrystalline CaWO₄