,Optical Dispersion Behavior and Band Gap Energy of Relaxor Ferroelectric 0.92Pb(Mg1/3Nb2/3)O3-0.08P

• 作 者: LIN Yan-Ting REN Bo ZHAO Xiang-Yong WANG Fei-Fei WANG Yao-Jin XU Hai-Qing LIN Di LUO Hao-Su
• 机 构: The State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institut
• 出 处: 中国物理快报（英文版）
• 发表日期: 2009年7期

Refractive indices and extinction coefficients of 0.92Pb(Mg1/3 Nb2/a )O3-0.08Pb Ti03 (PMN-0.08PT) single crystal are investigated by variable angle spectroscopic ellipsometry (VASE) at different wavelengths. The parameters relative to the energy band structure are obtained by fitting to the single-oscillator dispersion equation, and the band gap energy is also deduced from the Tauc equation. Similar to most oxygen-octahedra ferroelectrics,PMN-0.08PT has the same dispersion behavior described by the refractive-index dispersion parameters.