Gundakaram, R. ; Arulraj, Anthony ; Vanitha, P. V. ; Rao, C. N. R. ; Gayathri, N. ; Raychaudhuri, A. K. ; Cheetham, A. K. (1996) Effect of substitution of Cr3+ in place of Mn3+ in rare-earth manganates on the magnetism and magnetoresistance: role of superexchange interaction and lattice distortion in LnMn1−xCrxO3 Journal of Solid State Chemistry, 127 (2). pp. 354-358. ISSN 0022-4596
Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1006/jssc.1996.0394
Abstract
Magnetic and electrical properties of oxides of the formula LnMn1−xCrxO3(Ln=rare earth) have been investigated to understand the importance of the Mn3+-O-Cr3+ superexchange interactions, in contrast to the Ln1−xAxMnO3 (A=divalent cation) system, where double exchange interactions predominate. All the LnMn1−xCrxO3 compositions are ferromagnetic insulators and exhibit small values of negative magnetoresistance (MR) at ordinary temperatures, the highest value of MR at 6 T being ~20% at 120 K for some of the compositions. The results underscore the important role of double exchange, as well as lattice distortion effects, in giving rise to high values of MR in Ln1−xAxMnO3.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 43429 |
| Deposited On: | 11 Jun 2011 12:42 |
| Last Modified: | 05 Jul 2012 03:59 |
Repository Staff Only: item control page
