Magnetoresistive La0.83Sr0.17MnO3 Ceramics by DAAS Technique

• Published in: Chemistry of materials Vol. 10; no. 5; pp. 1374 - 1381
• Main Authors: Yang, S, Lin, C. T, Rogacki, K, Dabrowski, B, Adams, P. M, Speckman, D. M
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 18-05-1998
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electronic transport in condensed matter; Exact sciences and technology; Giant magnetoresistance; Growth from solutions; Inorganic compounds; Magnetic properties and materials; Magnetotransport phenomena, materials for magnetotransport; Materials science; Methods of crystal growth; physics of crystal growth; Mixed conductivity and conductivity transitions; Physics; Salts; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Inorganic compounds; Electrical conductivity; Magnetization; Transition element compounds; Giant magnetoresistance; Perovskites; Rare earth compounds; Experimental study; Lattice parameters; Magnetic transitions; Oxide ceramics; Strontium Manganites; Aqueous solutions; Crystal growth from solutions; Quaternary compounds; Lanthanum Manganites
• ISSN: 0897-4756; 1520-5002
• DOI: 10.1021/cm970769j

Manganese-based perovskites have been successfully synthesized using deposition by aqueous acetate solution (DAAS). This novel technique, which has the potential for depositing large area thin films with high throughput and low cost, involves the preparation of stoichiometric mixtures of metal−acetate precursor solutions, followed by the subsequent firing of these mixtures at relatively low temperature (600 °C) for short periods of time (<100 min), to produce crystalline lanthanum−strontium−manganate (LSMO) materials. For La0.83Sr0.17MnO3 perovskites, varying the firing temperature from 600 to 900 to 1200 °C (while maintaining a constant firing time of 100 min) results in an increase in product crystallite size (from ∼160 to ∼3300 Å), a sharpening and a shift toward higher temperatures of the metallic transition, a decrease in the material resistivity measured at 350 K (by 1 order of magnitude for each temperature studied), and a change in the XRD 2θ peaks consistent with a material phase transition. Lattice parameters, magnetic dependent resistivities, metallic and ferromagnetic transition temperatures, and magnetization values are comparable to those of LSMO materials prepared by much harsher, conventional methods. The advantages of using the DAAS technique for synthesizing manganese-based perovskites, in particular for thin/thick films, will be discussed.