Mahendiran, R. ; Mahesh, R. ; Raychaudhuri, A. K. ; Rao, C. N. R. (1996) Resistivity, giant magnetoresistance and thermopower in La0.7Sr0.3MnO3 showing a large difference in temperatures corresponding to the ferromagnetic transition and the insulator-metal transition Solid State Communications, 99 (3). pp. 149-152. ISSN 0038-1098
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/003810...
Related URL: http://dx.doi.org/10.1016/0038-1098(96)00233-5
Abstract
La0.7Sr0.3MnO3 samples prepared by heating the precursor gel at different temperatures in the 873-1473 K range show nearly the same ferromagnetic transition temperature (Tc≈392±4 K), but the insulator-metal like transition temperatures (Tp) are significantly lower (≈170 K) than the corresponding Tcs in the samples annealed at lower temperatures (873 K and 1073 K). Magnetoresistance shows a peak only in the sample where Tp≈Tc. Thermopower (S) is large and negative for the samples annealed at lower temperatures, but it is low, exhibiting a change of sign with temperature for the sample annealed at 1473 K.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Giant Magnetoresistance; Perovskite Oxides |
| ID Code: | 42387 |
| Deposited On: | 02 Jun 2011 12:53 |
| Last Modified: | 05 Jul 2012 03:55 |
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