Temperature dependent Raman scattering in KTiOPO4 and KTiOAsO4 single crystals

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Univ of Puerto Rico, San Juan, Puerto Rico [1 ]
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J Appl Phys | / 6卷 / 3235-3240期
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Crystal symmetry - Frequencies - Ionic conduction in solids - Mathematical models - Molecular vibrations - Phase transitions - Phonons - Potassium compounds - Raman scattering - Raman spectroscopy - Thermal effects;
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摘要：
Potassium titanyl phosphate (KTP) and potassium titanyl arsenate (KTA) show a different Raman spectra for their longitudinal and transverse modes in the frequency range 400-650 cm-1. The substitution ions in XO4 group modifying the force constant of crystal play a significant role for the difference between KTP and KTA in the middle-frequency region. The relative intensity of low-frequency bands shows to increase with increasing temperature.
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