Infrared absorption spectra of manganese oxides La1−x−yRyCaxMnO3−δ

Autor:	Zhu Jingsheng, Li Ke-Bin, Li Xijun, Zhu Kai-gui, Zhang Yuheng
Rok vydání:	1997
Předmět:	Bond length Crystallography Molecular geometry Absorption spectroscopy chemistry Octahedron Inorganic chemistry General Physics and Astronomy Infrared spectroscopy chemistry.chemical_element Manganese Absorption (chemistry) Ion
Zdroj:	Journal of Applied Physics. 81:6943-6947
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.365234
Popis:	Infrared transmission spectra were measured systematically in polycrystalline La1−xCaxMnO3−δ and several systems substituted by other rare earth (RE) ions such as Sm3+, Gd3+, Dy3+, etc., at La3+ sites or Fe ions at Mn sites but keeping the nominal Mn4+/Mn3+≈3/7. Two strong absorption peaks located around 600 and 350 cm−1, which are associated with internal phonon modes, i.e., stretching and bending modes of MnO6 octahedra, have been observed. Both of them are influenced by the concentrations of Ca and other RE ions substituting at the La and Mn sites. The details of the absorption peaks will be discussed on the basis of changes of the bond length of Mn-O and bond angle of Mn-O-Mn in MnO6 octahedra.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9b85cb5cb36881ea9af7a4ee7edb50af https://doi.org/10.1063/1.365234 Zobrazit plný text záznamu