Mössbauer study of chromium-substituted nickel ferrites

Abbasher M. Gismelseed, Ali A. Yousif

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Abstract

The structural and magnetic properties of the Cr substituted NiCr xFe 1-xO 4 (0≤x≤1.4) spinel ferrites have been investigated by means of X-ray diffraction and Mössbauer spectroscopy techniques. Their crystal structures are found to be pure cubic phases. The Mössbauer spectra at 295 and 78 K of all samples showed two well-resolved magnetic patterns corresponding to the tetrahedral A-sites and octahedral B-sites. The cation distributions driven from the area under resonance curve of each site revealed that the compounds are gradually transferred from perfect inverse spinel to partially normal spinel structure. The behavior of the magnetic properties as a function of Cr 3+ concentration has been explained on the basis of the driven cation distribution and it showed that the chrome-rich compositions can be explained in terms of the non-collinear spin model.

Original languageEnglish
Pages (from-to)215-222
Number of pages8
JournalPhysica B: Condensed Matter
Volume370
Issue number1-4
DOIs
Publication statusPublished - Dec 15 2005

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Keywords

  • Ferrites
  • Magnetic properties
  • Superexchange interactions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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