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Studies on electrical conduction behavior of La 1‐3x Ca x Ba x Sr x MnO 3 synthesized by chemical route
Author(s) -
Mandal K. D.,
Rai A. K.,
Parkash Om.
Publication year - 2008
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200710969
Subject(s) - manganite , dopant , electrical resistivity and conductivity , analytical chemistry (journal) , scanning electron microscope , valency , doping , atmospheric temperature range , perovskite (structure) , materials science , microstructure , crystallography , mineralogy , chemistry , ferromagnetism , condensed matter physics , linguistics , physics , philosophy , optoelectronics , engineering , chromatography , meteorology , electrical engineering , composite material
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). (© 2007 WILEY ‐VCH Verlag GmbH & Co. KGaA, Weinheim)