Structural, Mössbauer and magnetic studies of Nd0.1Sr0.9FeO3-δ mechanosynthesized nanoparticles

Hisham M. Widatallah*, Marwa S. Al-Shanfari, Khadija S. Al-Rashdi, Ahmed D. Al-Rawas, Abbasher M. Gismelseed, Mohamed E. Elzain, Fadhila N. Al-Mabsali

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The structural and magnetic properties of Nd0.1Sr0.9FeO3-δ nanoparticles (∼60–70 ​nm) formed by mechanosynthesis at 800 ​°C (12 ​h), which is ∼ 200–600 ​°C lower than the reported formation temperatures of rare earth cation-doped SrFeO3-δ phases, are reported. Both XRD and 57Fe Mӧssbauer spectroscopy show the nanoparticles to be a mixture of the cubic Nd0.1Sr0.9FeO3 and the Fe4+/Fe3+ mixed-valence tetragonal Nd0.1Sr0.9FeO2.875 phases in the ratio of ∼ 45: 55. XPS data reveal a complex surface composition for the nanoparticles where traces of the initial reactants as well as other SrFeO3-δ phases are detected. The Nd0.1Sr0.9FeO3-δ nanoparticles are found to display superparamagnetism with blocking temperatures of ≥78 ​K for the Nd0.1Sr0.9FeO3 phase and ∼ 61 ​K for the Nd0.1Sr0.9FeO2.875 one. The nanoparticles exhibit an antiferromagnetic-to-weak ferromagnetic transition at ∼23 ​K which is attributed to the combined effects of the helical magnetic structure of Nd0.1Sr0.9FeO3, spin canting in Nd0.1Sr0.9FeO2.875 and doping with the Nd3+cation.

Original languageEnglish
Article number123645
Pages (from-to)1-9
Number of pages9
JournalJournal of Solid State Chemistry
Publication statusPublished - Dec 1 2022
Externally publishedYes


  • Mechanosynthesis
  • Mössbauer spectroscopy
  • Perovskite
  • VSM
  • XPS
  • XRD

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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