Molecular vibrations of the layered-perovskite cobalt oxides characterized by infrared and Raman spectroscopies coupled with crystal structure refinement
作者： Shengli Huang , Keqing Ruan , Zongqiang Pang , Zhangming Lv , Huiyan Wu
DOI: 10.1016/J.SSC.2006.10.010
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摘要: Abstract Molecular vibrations of the polycrystalline Nd2−xSrxCoO4 are systematically characterized by powdered x-ray diffraction, Raman scattering and infrared spectra at different dopings as well temperatures. Structural refinements reveal that all specimens crystallize in K2NiF4 structure with space group I 4 / m is also confirmed phonon bands transmittance. The frequency shifts found to be very consistent elongation and/or contraction bond lengths. Moreover, for Nd0.75Sr1.25CoO4, active modes seem retrace evolutions magnetic structural temperature.
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