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Title: Raman scattering in charge-ordered Pr0.63Ca0.37MnO3: Anomalous temperature dependence of linewidth
Authors: Gupta, R
Pai, G Venketeshwara
Sood, A K
Ramakrishnan, T V
Rao, C N R
Keywords: Manganese Oxides
Issue Date: Jun-2002
Publisher: EDP Sciences
Citation: Europhysics Letters 58(5), 778-784 (2002)
Abstract: We report on the evolution of the Raman-active A(g) phonon modes in the charge-ordered manganite Pr0.63Ca0.37MnO3 as a function of temperature from 300 K to 25 K. Our studies reveal that the linewidths of the A(g)(2) and A(g)(4) phonons increase as temperature decreases. This anomalous temperature dependence of phonon lineshapes, seen for the first time in charge-ordered manganites, can be quantitatively understood in terms of a strong spin-phonon coupling involving t(2g) spins and A(g) phonons.
Description: Restricted Access
Other Identifiers: 0295-5075
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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