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- W2055532839 abstract "Geometrically frustrated pyrochlore Y2Ru2O7, which shows a spin-glass-like transition at TG ∼ 80 K, were investigated by temperature-dependent Raman scattering. Three discernable phonons appear around 315, 410, and 510 cm−1 without any abrupt change in the number of Raman active modes within the temperature range of 10–300 K. Fitting each phonon with Lorentz oscillators, we analyzed the effects of temperature on the phonon frequencies and the linewidths. The temperature-dependence of the mode near 510 cm−1 shows abnormal behavior below TG, while the other two phonons follow the usual thermal effect of lattice vibration. This behavior can be understood in terms of spin–phonon coupling. Considering the atomic modulations of each phonon mode, it is conjectured that the 510 cm−1 phonon mode is isotropically coupled to the spin degree of freedom, while the other modes are not." @default.
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- W2055532839 date "2006-11-01" @default.
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- W2055532839 title "Raman scattering study of the geometrically frustrated pyrochlore Y2Ru2O7" @default.
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- W2055532839 doi "https://doi.org/10.1016/j.vibspec.2006.05.004" @default.
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