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Synthesis, structural and magnetic properties of La1 − xCaxFeO3 prepared by the co-precipitation method

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Abstract

Lanthanum calcium ferrite La1 − xCaxFeO3 (where x = 0.05, 0.10 and 0.15) were synthesized by co-precipitation method. The structural refinement confirmed that all samples formed with the orthorhombic (Pbmn) structure with small impurities (LaFeO3 and Fe2O3). Fourier transformed infrared spectroscopy (FT-IR) results indicated that the electronic imbalance caused by the partial substitution for La3 +  by Ca2 +  is compensated by an oxidation state of iron ions. Mössbauer spectra at room temperature (RT) show five 6-line sub-spectra corresponding to Fe3 +  (superposition of 3 spectra), Fe4 +  and Fe5 +  in all samples. Magnetic hysteresis loops of these samples showed a significant weak ferromagnetic component at RT.

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Authors and Affiliations

  1. Physics Department, Faculty of Science, Al Azhar University, Nasr City, 11884, Cairo, Egypt

    E. K. Abdel-Khalek

  2. Chemistry Department, Faculty of Science, Al Azhar University, Nasr City, 11884, Cairo, Egypt

    Hany M. Mohamed

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  1. E. K. Abdel-Khalek
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Correspondence to E. K. Abdel-Khalek.

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Abdel-Khalek, E.K., Mohamed, H.M. Synthesis, structural and magnetic properties of La1 − xCaxFeO3 prepared by the co-precipitation method. Hyperfine Interact 222 (Suppl 1), 57–67 (2013). https://doi.org/10.1007/s10751-012-0640-5

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