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- W2068190449 abstract "Abstract From preliminary inelastic neutron scattering experiments performed in the vicinity of the cubic to tetragonal structural phase transitions in pure RbCaF3 (Tc = 193 K) and in mixed Rb0.65K0.35CaF3 (Tc = 291 K) fluoroperovkite crystals, we report the evolution of energy line width of the LA and TA acoustic phonon branches along the ΓX(0, 0, ξ) direction when approaching Tc. The significative increasing of the line width observed for the two concentrations can be interpreted in the framework of a model that predicts the existence of an intermediate disordered phase between tetragonal and cubic symmetry." @default.
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- W2068190449 date "1997-06-01" @default.
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- W2068190449 title "Evidence of disorder in the perovskite crystals RbCaF3 and Rb0.65K0.35CaF3 investigation of phonon acoustic modes by inelastic neutron scattering" @default.
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- W2068190449 doi "https://doi.org/10.1016/s0921-4526(96)00928-3" @default.
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