Studies on electrical conduction behavior of La1-3xCaxBaxSrxMnO3 synthesized by chemical route

✍ Scribed by K. D. Mandal; A. K. Rai; Om. Parkash

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 160 KB
• Volume: 43
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200710969

✦ Synopsis

In the manganite La 1-x M x MnO 3 (M = Ca, Ba, Sr) the doping concentration introduces a mixed valency (Mn 3+ , Mn 4+ ) which governs the magnetic and electrical properties of the compound. The perovskite oxides La 1-3x Ca x Ba x Sr x MnO 3 (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 1-3x Ca x Ba x Sr x MnO 3 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).