Structural and magnetic studies of the Zn-substituted magnesium ferrite chromate

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The mixed zinc-magnesium ferrite chromate with composition Mg1-xZnxFeCrO4 (0.0 ≤ x ≤ 1.0) prepared by the conventional solid state double sintering ceramic technique were characterized using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Mössbauer Spectroscopy (MS). The analysis of the X-ray pattern reveal that the samples crystalize in a single-phase cubic spinel structure and the lattice parameter increases linearly with increasing the Zn content. The SEM micrographs showed aggregates of stacked grains of about (0.2 ∼ 1.5 μm) in diameter. The 78 K Mössbauer spectrum of pure magnesium chromate shows an ordered magnetic structure with well resolved tetrahedral and octahedral sites. As Zn substitutes for Mg, the 78 K spectra started to show the presence of a paramagnetic component superimposed on broadened magnetic sextets. This behavior is attributed to the presence of superparamagnetic domains in the samples which will be discussed based on the weakening of A-B exchange interaction in ferrite lattice due to replacement of Fe3+ ions in tetrahedral sites by Zn2+ ions.

Original languageEnglish
Pages (from-to)57-63
Number of pages7
JournalHyperfine Interactions
Volume226
Issue number1-3
DOIs
Publication statusPublished - 2014

Fingerprint

Chromates
chromates
magnesium
ferrites
Ions
Scanning electron microscopy
scanning electron microscopy
Magnetic structure
Exchange interactions
Magnesium
Lattice constants
spinel
Ferrite
Zinc
lattice parameters
sintering
ions
x rays
Sintering
zinc

Keywords

  • Mössbauer spectroscopy
  • SEM
  • Spinel Mg-Zn-Cr Ferrites
  • XRD

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Structural and magnetic studies of the Zn-substituted magnesium ferrite chromate. / Gismelseed, A. M.; Mohammed, K. A.; Al-Rawas, A. D.; Yousif, A. A.; Widatallah, H. M.; Elzain, M. E.

In: Hyperfine Interactions, Vol. 226, No. 1-3, 2014, p. 57-63.

Research output: Contribution to journalArticle

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