Hopping conduction in charge-ordered rare-earth manganates Ln(1-x)Ca(x)MnO(3) (Ln = rare earth)

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Title:	Hopping conduction in charge-ordered rare-earth manganates Ln(1-x)Ca(x)MnO(3) (Ln = rare earth)
Authors:	Sarathy, K Vijaya Parashar, S Raju, A R Rao, C N R
Keywords:	manganates hopping conduction Mixed-Valence Manganites Magnetoresistance Localization Thermopower Transport Films
Issue Date:	Mar-2002
Publisher:	Editions Scientifiques Medicales Elsevier
Citation:	Solid State Sciences 4(3), 353-357 (2002)
Abstract:	Electrical resistivity behavior of single crystals as well as polycrystalline pellets of rare earth manganates has been investigated below the charge-ordering temperatures to understand the mechanism of conduction. The resistivity of both the single- and polycrystalline samples of Gd0.5Ca0.5MnO3 and Nd0.5Ca0.5MnO3 obey the T-1/4 law, characteristic of variable range hopping. A similar dependence is found in the hole-doped Pr0.6Ca0.4MnO3 as well, but the data of the electron-doped Pr0.4Ca0.6MnO3 do not seem to obey any T-1/n law satisfactorily. AC conductivity measurements also reflect the unusual nature of the electron-doped composition. (C) 2002 editions scientifiques et medicales Elsevier SAS. All rights reserved.
Description:	Restricted Access
URI:	https://libjncir.jncasr.ac.in/xmlui/10572/1040
Other Identifiers:	1293-2558
Appears in Collections:	Research Papers (Prof. C.N.R. Rao)

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