Mahesh, R. ; Mahendiran, R. ; Raychaudhuri, A. K. ; Rao, C. N. R. (1996) Effect of particle size on the giant magnetoresistance of La0.7Ca0.3MnO3 Applied Physics Letters, 68 (6). pp. 2291-2293. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v68/i16/p2291...
Related URL: http://dx.doi.org/10.1063/1.116167
Abstract
Effect of particle size on the electron transport and magnetic properties of La0.7Ca0.3MnO3 has been investigated. While the ferromagnetic Tc, low field magnetic susceptibility, and insulator-metal transition are markedly affected by the particle size, the maximum magnetoresistance exhibited by the samples near Tc is not sensitive to the particle size. However, the magnetoresistance at 4.2 K increases with decrease in particle size, suggesting a substantial contribution by the grain boundaries. Preliminary measurements on La0.7Sr0.3MnO3 samples of different particle sizes also corroborate the above conclusions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Lanthanum Compounds; Calcium Compounds; Manganese Oxides; Magnetoresistance; Ferromagnetism; Size Effect; Metal-insulator Transformations; Temperature Dependence |
| ID Code: | 42658 |
| Deposited On: | 04 Jun 2011 13:44 |
| Last Modified: | 05 Jul 2012 03:58 |
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