Murugavel, P. ; Narayana, C. ; Sood, A. K. ; Parashar, S. ; Raju, A. R. ; Rao, C. N. R. (2000) Magnetic excitations in charge-ordered Nd0.5Ca0.5MnO3: a Brillouin scattering study EPL: Europhysics Letters, 52 (4). pp. 461-467. ISSN 0295-5075
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Official URL: http://iopscience.iop.org/0295-5075/52/4/461?fromS...
Related URL: http://dx.doi.org/10.1209/epl/i2000-00460-0
Abstract
Brillouin scattering studies on single crystals of a charge-ordered manganite, Nd0.5Ca0.5MnO3, have been carried out for the first time. The spectra show two modes at (B-mode) and 60 GHz (S-mode). The B-mode frequency and intensity from 300 K to 27 K, covering both the charge ordering transition at 250 K and the antiferromagnetic transition, at 170 K, exactly follow the same temperature dependence as the d.c. magnetic susceptibility. The B-mode is associated with bulk magnetic excitations and the S-mode with surface magnetic excitations of the manganite with ferromagnetic correlations. The study is strongly indicative of the presence of ferromagnetic inhomogeneities in the charge-ordered as well as antiferromagnetic phases.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to EDP Sciences. |
| ID Code: | 44729 |
| Deposited On: | 23 Jun 2011 05:37 |
| Last Modified: | 03 Oct 2011 14:32 |
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