Terahertz-infrared spectroscopy of overdoped manganites La.sub.1-x./sub.Ca.sub.x./sub.MnO.sub.3./sub

0449161 - FZÚ 2016 RIV NL eng J - Journal Article
Kadyrov, L.S. - Zhukova, E.S. - Torgashev, V. I. - Gorshunov, B. P. - Prokhorov, A. S. - Motovilova, E.A. - Fischgrabe, F. - Moshnyaga, V. - Zhang, T. - Kremer, R. - Pracht, U. - Zapf, S. - Pokorný, Jan - Untereiner, G. - Kamba, Stanislav - Dressel, M.
Terahertz-infrared spectroscopy of overdoped manganites La_1-xCa_xMnO₃
Physica B-Condensed Matter. Roč. 460, SI (2015), s. 199-201. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA ČR GAP204/12/1163
Institutional support: RVO:68378271
Keywords : manganites * terahertz spectroscopy * Raman spectroscopy
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.352, year: 2015

Terahertz and infrared spectra of dielectric permittivity and optical conductivity of overdoped manganites La1-xCaxMnO3 (0.5≤x≤1) have been measured at frequencies from 4 cm-1 to 700 cm-1 and at temperatures T from 5 K to 300 K. Strongly asymmetric absorption bands have been found in the compounds which are in charge-ordered state (0.5<x< 0.85)and have commensurate calcium doping. The bands are associated with a boson peak, Raman scattering confirmed our assignment of the bands origin.
Permanent Link: http://hdl.handle.net/11104/0250738