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Title: Magnetic excitations in charge-ordered Nd0.5Ca0.5MnO3: A Brillouin scattering study
Authors: Murugavel, P
Narayana, C
Sood, A K
Parashar, S
Raju, A R
Rao, C N R
Keywords: Neutron-Scattering
Issue Date: Nov-2000
Publisher: E D P Sciences
Citation: Europhysics Letters 52(4), 461-467 (2000)
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 similar to 27 GHz (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.
Description: Restricted Access
Other Identifiers: 0295-5075
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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