Far infrared and submillimetre dielectric dispersion in ferroelectric PbHPO4 and PbHAsO4

作者: J. Kroupa , J. Petzelt , G. V. Kozlov , A. A. Volkov

DOI: 10.1080/00150197808237273

关键词: Soft modesCondensed matter physicsFar infraredAnharmonicitySpectral lineReflectivityMaterials scienceTransmittanceDielectric dispersionFerroelectricityNuclear magnetic resonance

摘要: Abstract Polarized far-infrared reflectivity and submillimetre transmittance measurements revealed that the soft mode in PbHPO4 is of a relaxational type with relaxation time τ ≃ 5.3 · 10−11 (T-Tc )-1s for T>Tc =310 K 1.3 (Tc-T)−1 s T

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