Brillouin Scattering Studies of La_{0.77}Ca_{0.23}MnO_3 Across Metal-Insulator Transition

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dc.creatorSeikh, Md. Motin
dc.creatorNarayana, Chandrabhas
dc.creatorSudheendra, L.
dc.creatorSood, A. K.
dc.creatorRao, C. N. R.
dc.date2003-03-03
dc.date.accessioned2026-07-07T02:49:59Z
dc.date.available2026-07-07T02:49:59Z
dc.descriptionTemperature-dependent Brillouin scattering studies have been carried out on La_{0.77}Ca_{0.23}MnO_3 across the paramagnetic insulator - ferromagnetic metal (I-M) transition. The spectra show a surface Rayleigh wave (SRW) and a high velocity pseudo surface acoustic wave (HVPSAW) besides bulk acoustic waves (BAW). The Brillouin shifts associated with SRW and HVPSAW show blue-shifts, where as the frequencies of the BAW decrease below the I-M transition temperature (T_C) of 230 K. These results can be understood based on the temperature dependence of the elastic constants. We also observe a central peak whose width is maximum at T_C.
dc.description7 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0303029
dc.identifierhttp://arxiv.org/abs/cond-mat/0303029
dc.identifierJ. Phys.: Condens. Matter 16 (2004) 4381--4390
dc.identifierdoi:10.1088/0953-8984/16/24/019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20966
dc.subjectMaterials Science
dc.titleBrillouin Scattering Studies of La_{0.77}Ca_{0.23}MnO_3 Across Metal-Insulator Transition
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