Structural and 57Fe Mössbauer study of EuCr 1-xFe xO 3 nanocrystalline particles

H. M. Widatallah, T. M H Al-Shahumi, A. M. Gismelseed, Z. Klencsár, A. D. Al-Rawas, I. A. Al-Omari, M. E. Elzain, A. A. Yousif, M. Pekala

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3 Citations (Scopus)

Abstract

A structural and Mössbauer study of mechanosynthesized EuCr 1-xFe xO 3 nanocrystalline particles (~20-30 nm) is presented. The lattice parameters increase with increasing x-value leading to an increasingly distorted structure. The crystallite sizes range between 20 nm and 30 nm. Magnetic and 57Fe Mössbauer measurements show the samples with x <0. 7 to be paramagnetic and those with x ≥ 0. 7 to be partially superparamagnetic at 298 K. The 78 K Mössbauer spectra of the samples with x = 0. 3-1. 0 are composed of well-resolved two sextets that are explicable in terms of the structural model that we recently have proposed for the EuCrO 3 nanoparticles according to which the transition metal ions and Eu 3+ partly exchange their usual sites in the perovskite-related structure (Widatallah et al. J Phys D Appl Phys 44:265403, 2011). Consequently, the two sextets obtained at 78 K refer to Fe 3+ ions at the usual B-octahedral site and the A-dodecahedral site usually occupied by Eu 3+.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalHyperfine Interactions
Volume205
Issue number1-3
DOIs
Publication statusPublished - Mar 2012

Keywords

  • Magnetization
  • Milling
  • Mössbauer spectroscopy
  • Perovskite
  • XRD

ASJC Scopus subject areas

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

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