Synthesis by molten salt method of the AFeO3 system (A=La, Gd) and its structural, vibrational and internal hyperfine magnetic field characterization

• Published in: Physica. B, Condensed matter Vol. 443; pp. 90 - 94
• Main Authors: Romero, M., Gómez, R.W., Marquina, V., Pérez-Mazariego, J.L., Escamilla, R.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.06.2014; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Crystal structure; Exact sciences and technology; IR spectroscopy; Lattice dynamics; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mössbauer effect; other γ-ray spectroscopy; Mössbauer spectroscopy; Phonon states and bands, normal modes, and phonon dispersion; Phonons and vibrations in crystal lattices; Physics; Raman spectroscopy; X-ray diffraction; X-ray diffraction; Raman spectroscopy; IR spectroscopy; Mössbauer spectroscopy; Crystal structure; Rietveld method; Raman spectra; Hyperfine magnetic field; Moessbauer effect; Molten salts; Iron Gadolinium Oxides Mixed; XRD; Infrared spectra; Heat treatments; Internal magnetic fields; Vibrational modes; Iron Lanthanum Oxides Mixed; Crystal growth from melts
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2014.03.024

Polycrystalline samples of LaFeO3 and GdFeO3 were synthesized by the molten salt method. Some properties and the quality of the resulting compounds were investigated. The crystal structure and purity of the samples were determined through X-ray diffraction and Rietveld analysis. The vibrational properties were characterized by Raman and IR spectroscopy. Mössbauer spectroscopy was used to determine the ionic state of the Fe ions and the internal hyperfine magnetic fields. Considerable reduction of the heat treatment (temperature and time) for the reaction to take place was achieved without detriment of the quality of the compounds.