Vijaya Sarathy, K. ; Parashar, S. ; Raju, A. R. ; Rao, C. N. R. (2002) Hopping conduction in charge-ordered rare-earth manganates Ln1−xCaxMnO3 (Ln=rare earth) Solid State Sciences, 4 (3). pp. 353-357. ISSN 1293-2558
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S12932...
Related URL: http://dx.doi.org/10.1016/S1293-2558(01)01263-8
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 42221 |
| Deposited On: | 02 Jun 2011 07:39 |
| Last Modified: | 02 Jun 2011 07:39 |
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