Mandal, P. ; Choudhury, P. ; Ghosh, B. (2005) Transport studies of metallic La1−xAxCoO3 (A=SR, Ba) ferromagnet Physica B: Condensed Matter, 359-36 . pp. 1363-1365. ISSN 0921-4526
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Official URL: http://doi.org/10.1016/j.physb.2005.01.412
Related URL: http://dx.doi.org/10.1016/j.physb.2005.01.412
Abstract
Well below TC, both resistivity (ρ) and thermopower (S) of La1−xAxCoO3 (A=SR, Ca, Ba) exhibit T2 behavior while just below TC, they show T4 dependence due to the scattering of charge carriers by magnetic fluctuations. This T4 dependence of ρ close to TC can be suppressed by a magnetic field, leading to a negative bulk magnetoresistance in cobaltates and in other itinerant ferromagnets such as manganites and CrO2. The role of ionic size on T4 dependence of ρ and S has also been studied. A phase diagram has been constructed for La1−xBaxCoO3 system.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 122869 |
| Deposited On: | 25 Aug 2021 06:40 |
| Last Modified: | 25 Aug 2021 06:40 |
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