Author(s)

Cléber Candido da Silva, Antonio S. B. Sombra

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Ca₂Fe₂O₅ powder sample, were prepared to investigate the origin of the weak ferromagnetic component reported in literature for calcium ferrite single crystals. In this work, the calcination method was used to produce nanocrystalline powders of Ca₂Fe₂O₅. XRD measurement has shown the presence of Fe₃O₄ magnetite and CaO as impurity phases. The ferrimagnetic phase deeply influences the magnetic behavior with features very similar to those reported in literature for Ca₂Fe₂O₅, both powders and single crystals. Our results support the hypothesis that the weak ferromagnetic component observed in Ca₂Fe₂O₅ can be also due to the presence of magnetite impurity traces in the samples. The powders were submitted to calcination processes at 500℃ for 2 hours and 950℃ for 16 hours. The sintered sample was submitted at 1050℃ for 6 hours and characterized by X-Ray Powder diffraction (XRD), dielectric measurements, Magnetization and Scanning Electron Microscopy (SEM) analysis.

Ca₂Fe₂O₅, Dielectric Measurements, Magnetization

C. Silva and A. Sombra, "Temperature Dependence of the Magnetic and Electric Properties of Ca₂Fe₂O₅," Materials Sciences and Applications, Vol. 2 No. 9, 2011, pp. 1349-1353. doi: 10.4236/msa.2011.29183.