Shivakumara, C (2006) Low temperature synthesis and characterization of rare earth orthoferrites $LnFeO_3$ (Ln = La, Pr and Nd) from molten NaOH flux. In: Solid State Communications, 139 (4). pp. 165-169.
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Abstract
Rare earth orthoferrites of the general formula $LnFeO_3$ (Ln = La, Pr and Nd) phases have been synthesized for the first time in molten NaOH flux at a temperature as low as $400^oC$. The flux-grown oxides were characterized by XRD, SEM, EDX, FT-IR and temperature dependent electrical resistivity measurements. The crystal structures of these materials have been refined by the Rietveld profile analysis method using powder XRD data. All these oxides crystallize in the orthorhombic structure (space group Pbnm, no.62) and exhibit insulating behavior. As-synthesized samples show three active IR absorption bands for Fe–O stretching vibration $(\vartheta_1\hspace{2mm} mode)$ and O–Fe–O deformation vibration $(\vartheta_2\hspace{2mm}mode)$. In the KOH flux on the other hand, no product formation is observed, thus providing evidence for the differences in the two alkali fluxes.
Item Type: | Journal Article |
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Publication: | Solid State Communications |
Publisher: | Elsevier |
Additional Information: | Copyright of this article belongs to Elsevier. |
Keywords: | A. LaFeO3;A. Perovskite oxides;B. Chemical synthesis;C. Crystal structure;C. Powder X-ray |
Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
Date Deposited: | 18 Sep 2006 |
Last Modified: | 19 Sep 2010 04:31 |
URI: | http://eprints.iisc.ac.in/id/eprint/8573 |
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