Temperature dependence of the linewidth of the first-order Raman spectra for MnF2 crystal |
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| Authors: | Tsutomu Sato |
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| Institution: | (1) Department of Physics, Faculty of Science, Hirosaki University, 036 Hirosaki, Japan |
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| Abstract: | The first-order Raman spectra ofE
gandA
1g
modes in MnF2 crystal were measured at temperatures from 4.2 to 563 K, and the values of the linewidths obtained. The temperature dependence
of the linewidths was analyzed by the phonon dispersion curves based on the rigid ion model, and the result showed that it
was caused approximately by the cubic anharmonic term in crystal potential energy. |
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| Keywords: | Raman spectra linewidth temperature dependence anharmonic term phonon dispersion curves two phonon density of states rigid ion model |
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