Characterization of oxide phases formed during the synthesis of ER3Fe5O12

M. Ristić, I. Czakó-Nagy, S. Popović, S. Musić, A. Vértes, M. Ivanda

Research output: Contribution to journalArticle

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Abstract

The mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 was thermally treated up to 1300°C. The samples obtained up to 650°C were amorphous as observed by X-ray diffraction (XRD). The first appearance of Er3Fe5O12 (ErIG) was observed in the sample obtained at 750°C. The 57Fe Mossbauer spectrum of the mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 at room temperature was characterized by a quadrupole doublet (δ(Fe) = 0.38, Δ= 0.80, and Γ = 0.50 mm s-1). After heating the starting material to 650°C, the superposition of two quadrupole doublets and of a sextet of very small intensity with H = 506 kOe was observed. This result indicated that the amorphous fraction, detected by XRD, actually contained an additional Fe-bearing oxide phase of very fine particles which probably exhibited poor crystallinity. The sample obtained at 1300°C was characterized by two hyperline magnetic fields at room temperature with H(d) = 394 and H(a) = 489 kOe corresponding to ErIG. Selected samples were also characterized by laser Raman spectoscopy.

Original languageEnglish
Pages (from-to)281-284
Number of pages4
JournalJournal of Molecular Structure
Volume410-411
DOIs
Publication statusPublished - 1997

Fingerprint

X-Ray Diffraction
Oxides
Bearings (structural)
X ray diffraction
Temperature
oxides
Magnetic Fields
synthesis
Heating
hydroxides
Lasers
quadrupoles
Magnetic fields
Raman lasers
room temperature
diffraction
crystallinity
x rays
heating
hydroxide ion

Keywords

  • ErFeO
  • ErFeO
  • Mossbauer spectroscopy
  • Oxide phases
  • Raman spectroscopy
  • X-ray diffraction

ASJC Scopus subject areas

  • Structural Biology
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Characterization of oxide phases formed during the synthesis of ER3Fe5O12. / Ristić, M.; Czakó-Nagy, I.; Popović, S.; Musić, S.; Vértes, A.; Ivanda, M.

In: Journal of Molecular Structure, Vol. 410-411, 1997, p. 281-284.

Research output: Contribution to journalArticle

Ristić, M. ; Czakó-Nagy, I. ; Popović, S. ; Musić, S. ; Vértes, A. ; Ivanda, M. / Characterization of oxide phases formed during the synthesis of ER3Fe5O12. In: Journal of Molecular Structure. 1997 ; Vol. 410-411. pp. 281-284.
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abstract = "The mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 was thermally treated up to 1300°C. The samples obtained up to 650°C were amorphous as observed by X-ray diffraction (XRD). The first appearance of Er3Fe5O12 (ErIG) was observed in the sample obtained at 750°C. The 57Fe Mossbauer spectrum of the mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 at room temperature was characterized by a quadrupole doublet (δ(Fe) = 0.38, Δ= 0.80, and Γ = 0.50 mm s-1). After heating the starting material to 650°C, the superposition of two quadrupole doublets and of a sextet of very small intensity with H = 506 kOe was observed. This result indicated that the amorphous fraction, detected by XRD, actually contained an additional Fe-bearing oxide phase of very fine particles which probably exhibited poor crystallinity. The sample obtained at 1300°C was characterized by two hyperline magnetic fields at room temperature with H(d) = 394 and H(a) = 489 kOe corresponding to ErIG. Selected samples were also characterized by laser Raman spectoscopy.",
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AU - Ristić, M.

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AU - Popović, S.

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AU - Vértes, A.

AU - Ivanda, M.

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N2 - The mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 was thermally treated up to 1300°C. The samples obtained up to 650°C were amorphous as observed by X-ray diffraction (XRD). The first appearance of Er3Fe5O12 (ErIG) was observed in the sample obtained at 750°C. The 57Fe Mossbauer spectrum of the mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 at room temperature was characterized by a quadrupole doublet (δ(Fe) = 0.38, Δ= 0.80, and Γ = 0.50 mm s-1). After heating the starting material to 650°C, the superposition of two quadrupole doublets and of a sextet of very small intensity with H = 506 kOe was observed. This result indicated that the amorphous fraction, detected by XRD, actually contained an additional Fe-bearing oxide phase of very fine particles which probably exhibited poor crystallinity. The sample obtained at 1300°C was characterized by two hyperline magnetic fields at room temperature with H(d) = 394 and H(a) = 489 kOe corresponding to ErIG. Selected samples were also characterized by laser Raman spectoscopy.

AB - The mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 was thermally treated up to 1300°C. The samples obtained up to 650°C were amorphous as observed by X-ray diffraction (XRD). The first appearance of Er3Fe5O12 (ErIG) was observed in the sample obtained at 750°C. The 57Fe Mossbauer spectrum of the mixed hydroxide 3Er(OH)3 + 5Fe(OH)3 at room temperature was characterized by a quadrupole doublet (δ(Fe) = 0.38, Δ= 0.80, and Γ = 0.50 mm s-1). After heating the starting material to 650°C, the superposition of two quadrupole doublets and of a sextet of very small intensity with H = 506 kOe was observed. This result indicated that the amorphous fraction, detected by XRD, actually contained an additional Fe-bearing oxide phase of very fine particles which probably exhibited poor crystallinity. The sample obtained at 1300°C was characterized by two hyperline magnetic fields at room temperature with H(d) = 394 and H(a) = 489 kOe corresponding to ErIG. Selected samples were also characterized by laser Raman spectoscopy.

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