Materials Research Bulletin, Vol.39, No.1, 71-81, 2004
Na substitution for La- and Mn-sites in LaMnO3 from alkali halide fluxes: low temperature synthesis, structure and properties
La1-xNaxMn1-yNayO3 (0.12 < x < 0.16; 0.04 < y < 0.07) have been synthesized from NaBr and NaI fluxes at relatively low temperature of 850 and 750 degreesC, respectively. Final composition of these oxides was obtained from chemical analysis of the elements present. The flux grown oxides crystallize in the rhombohedral structure (space group R-3c, No. 167) and are ferromagnetic metals (FMM). Chemical analysis and Rietveld refinement of X-ray data indicate Na ion is substituted for both La- and Mn-sites in the compound prepared from NaBr and Nal fluxes with 33 and 49% of Mn4+ concentration, respectively. (C) 2003 Elsevier Ltd. All rights reserved.