Raman and infrared characterization of gadolinium-doped manganese sulfide |
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Authors: | Y. V. Gerasimova O. B. Romanova A. A. Ivanenko A. S. Krylov |
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Affiliation: | 1. Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia;2. Department of Experimental Physics and Innovation Technology, Siberian Federal University, Krasnoyarsk, Russia;3. Laboratory of the Resonance Properties of Magnetically Ordered Media, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia |
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Abstract: | Gadolinium manganese sulfide solid solutions are investigated by infrared and Raman spectroscopy. Longitudinal optical–transverse optical splitting of the manganese–sulfur bond vibration is observed in the vibrational spectra. The Raman spectra contain modes that are prohibited in the crystal structure of the alpha phase of manganese sulfide, which are associated with activation of the phonons from both the Brillouin zone center and its X and L points. The concentration dependence of transverse optical and longitudinal optical modes’ frequencies is calculated within the frame of the modified random-element-isodisplacement model, being in good agreement with the experimental results. Both theory and experiment show that the solid solution under study exhibits a “one-mode” behavior. |
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Keywords: | Infrared lattice dynamics manganese sulfide Raman |
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