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Get Free AccessBrillouin 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.
P. Murugavel, Chandrabhas Narayana, A. K. Sood, Sachin Parashar, A. R. Raju, Cnr Rao (2000). Magnetic excitations in charge-ordered Nd <sub>0.5</sub> Ca <sub>0.5</sub> MnO <sub>3</sub> : A Brillouin scattering study. EPL (Europhysics Letters), 52(4), pp. 461-467, DOI: 10.1209/epl/i2000-00460-0.
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Type
Article
Year
2000
Authors
6
Datasets
0
Total Files
0
Language
English
Journal
EPL (Europhysics Letters)
DOI
10.1209/epl/i2000-00460-0
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