Nonstoichiometry, defects and thermodynamic properties of YFeO3, YFe2O4 and Y3Fe5O12

Jacob, Κ. T.; Rajitha, G.

doi:10.1016/j.ssi.2012.07.003

Cited by 30 publications

(15 citation statements)

References 15 publications

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“…However, the preparation of the nanomaterials having RFeO 3 single phase by the mentioned methods requires the investigation of many factors including heating temperature and retention time, pH, stoichiometric ratio between the components, etc. As a result, the optimal conditions were difficult to be determined, and the formation of impurity phases such as Fe [12,13] might have a negative impact on the quality of the obtained materials. In our previous research [14][15][16], the perovskite nanomaterials were successfully synthesized by co-precipitation method via the hydrolysis of transition metal ions in boiling water.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

Nguyen¹,

Chau²,

Nguyen³

et al. 2018

Nanosystems: Phys. Chem. Math.

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YFe 1−x CoxO 3 (0.1 ≤ x ≤ 0.5) perovskite-type nanomaterials were successfully synthesized by the chemical co-precipitation method via the hydrolysis of Y(III), Fe(III) and Co(II) cations in boiling water using 5 % aqueous KOH solution as a precipitating agent. Along with the increase of cobalt ion concentration (x values, from 0.1 to 0,5), there was an decrease in the crystallite size nanomaterials (from 25.68 to 22.89 nm), as well as in the lattice constants (a = 5.5781-5.5217Å; b = 5.2732-5.2177Å, c = 7.5902-7.5009Å; V = 223.26-216.11Å), but there was an increase in the magnetic parameters including coercive force (Hc = 88.86 Oe), remnant magnetization (Mr = 0.031-0.268 emu/g), saturation magnetization (Ms = 0.413-1.006 emu/g) and maximum energy product ((BH)max = 0.413-1.006 emu/g).

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Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

Nguyen¹,

Chau²,

Nguyen³

et al. 2018

Nanosystems: Phys. Chem. Math.

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“…The crystal of YIG is described in the trigonal phase (space group R-3) [4] and cubic phase (space group Ia-3d) [5]. Recently, several works on improving the magnetic and electrical properties of YIG have been reported in the open literature [6][7][8][9][10][11][12][13][14]. K. Bouziane et al [6] prepared Y 3 Fe 5−2x Al x Cr x O 12 samples by ceramic technique and found that the Fe 3+ at 16a positions (octahedral sites) was substituted by Cr 3+ , while the Fe 3+ at 24d positions (tetrahedral sites) was replaced by Al 3+ .…”

Section: Introductionmentioning

confidence: 99%

“…W. Zhong et al [7] reported a novel cathode material, Y 2.5 Ca 0.5 Fe 5 O 12 , which was used for intermediate temperature solid oxide fuel cells. K. T. Jacob et al [8] investigated the thermodynamic, nonstoichiometry and defects of * E-mail: taoshenchina@163.com YFeO 3 , YFe 2 O 4 and Y 3 Fe 5 O 12 . They found that the predominant defects in Y 3 Fe 5 O 12−σ are cation interstitials.…”

Section: Introductionmentioning

confidence: 99%

First principles study of structure, electronic and optical properties of Y₃Fe₅O₁₂ in cubic and trigonal phases

Shen

Hailong

et al. 2015

Materials Science-Poland

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First principles calculations have been performed to investigate the structure, electronic and optical properties of Y 3 Fe 5 O 12 . Both the cubic and trigonal phases have been considered in our calculation. The calculated structural parameters are slightly larger than the experimental values. The band structures show that Y 3 Fe 5 O 12 in cubic and trigonal phases have direct band gaps of 0.65 and 0.17 eV. The calculations of dielectric function, absorption, extinction coefficient, refractive index, energy loss function and reflectivity are presented.

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“…Another important consideration has to be made regarding the magnetic properties related to non-stoichiometry. Many efforts have been made to produce mostly pure YIG, but only a few studies have been found to correlate nonstoichiometry and oxidation number effects on the final magnetic properties in both YIG and orthoferrite ceramics [20]- [22].…”

Section: Introductionmentioning

confidence: 99%

Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS

Cortés-Escobedo¹,

Jesús²,

Bolarín-Miró³

et al. 2014

AMPC

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Stoichiometric mixtures of FeO and Y 2 O 3 were milled and heat treated to obtain yttrium iron garnet, Y 3 Fe 5 O 12. Two types of heating systems were used: one, a spark plasma sintering machine and the second, an electrical oven. The magnetic properties of the resulting specimens have been analyzed and discussed as a function of the grain size and the particles' morphology. The partial formation of garnet and orthoferrite phases was revealed on the obtained powder through microstructural analyses after 9 h of ball milling. The milled powders were transformed into the orthoferrite phase after the SPS-treatment at 700˚C and 900˚C. Magnetic-saturation studies revealed magnetic responses up to 12.7 emu/g for specimens SPS-treated at 700˚C, whereas 2.1 emu/g for samples SPS-treated at 900˚C. Conventionally treated specimens at 700˚C developed 0.36 emu/g of magnetization, while 0.93 emu/g was registered for those treated at 900˚C.

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Nonstoichiometry, defects and thermodynamic properties of YFeO3, YFe2O4 and Y3Fe5O12

Cited by 30 publications

References 15 publications

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

First principles study of structure, electronic and optical properties of Y₃Fe₅O₁₂ in cubic and trigonal phases

Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS

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Nonstoichiometry, defects and thermodynamic properties of YFeO3, YFe2O4 and Y3Fe5O12

Cited by 30 publications

References 15 publications

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

Structural and magnetic properties of YFe(1-x)CoxO3 (0.1<x<0.5) perovskite nanomaterials synthesized by coprecipitation method

First principles study of structure, electronic and optical properties of Y3Fe5O12 in cubic and trigonal phases

Mechano-Synthesized Orthoferrite Starting from W&#252;stite Assisted by SPS

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Product

Resources

About

First principles study of structure, electronic and optical properties of Y₃Fe₅O₁₂ in cubic and trigonal phases

Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS