Raman spectra of olivine solid solutions (FexMg1−x
)2SiO4 and spin-vibration interaction |
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| Authors: | S V Gaisler B A Kolesov |
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| Institution: | (1) Novosibirsk State University, Novosibirsk;(2) A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk |
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| Abstract: | Room temperature Raman spectra of synthesized powder (FexMg1?x )2SiO4 solid solutions are obtained. Frequency trend of all modes versus composition shows clearly the existence of a step at x = 0.3. A step-like behavior of vibration frequencies at the given composition that coincides with the percolation threshold for the olivine lattice is related to the appearance of magnetic excitations in the disordered magnetic medium owing to the spin-vibration interaction. |
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| Keywords: | Raman spectroscopy solid solutions spin-vibration interaction percolation threshold |
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