Studies on electrical conduction behavior of La1-3xCaxBaxSrxMnO3 synthesized by chemical route by K. D. Mandal, A. K. Rai, and Om. Parkash

Crystal Research and Technology

Cryst. Res. Technol. 43, 297 (2008) - Abstract -

Studies on electrical conduction behavior of La_1-3xCa_xBa_xSr_xMnO₃ synthesized by chemical route

K. D. Mandal, A. K. Rai, and Om. Parkash*

Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi-221005 (U.P), India
*Department of Ceramic Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221005 (U.P), India

Keywords	oxide materials, chemical synthesis, microstructure, X-ray diffraction
PACS	81.20.Ka, 81.40.Rs
DOI	10.1002/crat.200710969

In the manganite La_1-xM_xMnO₃ (M = Ca, Ba, Sr) the doping concentration introduces a mixed valency (Mn³⁺, Mn⁴⁺) which governs the magnetic and electrical properties of the compound. The perovskite oxides La_1-3xCa_xBa_xSr_xMnO₃ (x = 0.00, 0.05, 0.10) were prepared by chemical method. Single-phase formation is confirmed by XRD studies. The electrical behavior of compositions with x = 0.00, 0.05 and 0.10 in the system La_1-3xCa_xBa_xSr_xMnO₃ was studied in the temperature range 300-420 K. It is observed that conductivity decreases with increasing temperature as well as dopants concentration. Metallic behavior of these compositions decreases with increasing dopants concentration (x). The microstructures of these samples have been characterized using scanning electron microscopy (SEM).

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