Temperature dependence of Zr and Ti K-edge XANES spectra for para- and ferro-electric perovskite-type PbZrO3, PbTiO3 and BaTiO3
Temperature dependence of Zr and Ti K-edge XANES spectra for para- and ferro-electric perovskite-type PbZrO3, PbTiO3 and BaTiO3
复制标题
顺电和铁电钙钛矿型 PbZrO3、PbTiO3 和 BaTiO3 的 Zr 和 Ti K 边 XANES 光谱的温度依赖性
DOI：
10.1088/1742-6596/712/1/012121
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
H Arima and K Sugiyama
中科院分区：
文献类型：
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作者：
A Yoshiasa;T Nakatani;T Hiratoko;T Tobase;A Nakatsuka;M Okube;H Arima and K Sugiyama
在10K至850K的温度范围内测量了PbZrO 3 、PbTiO 3 和BaTiO 3 钙钛矿型化合物的Zr和Ti K边XANES光谱。使用吸收强度不变点 (AIIP) 标准化在较宽的温度范围内对近边缘光谱进行定量比较。通过计算 XANES 光谱强度的温度差，可以识别预边缘肩部的明显温度依赖性。仅在顺电相和铁电相中观察到前边缘肩部和峰值强度的降低，并绘制曲线，而不是直线。肩部和前边缘峰值强度的梯度种类丰富。推测前边缘峰和肩部吸收的减少是由于 Zr 原子相对于氧八面体的偏离中心位置移动到中心位置。 PbZrO 3 顺电相中的Zr离子具有与铁电钙钛矿中的Ti离子相同的温度行为。
Zr and Ti K-edge XANES spectra of PbZrO 3, PbTiO 3 and BaTiO 3 perovskite-type compounds were measured in the temperature range from 10K to 850K. Quantitative comparisons for the near-edge spectra were performed in a wide temperature range using the absorption intensity invariant point (AIIP) standardization. Clear temperature dependence for pre-edge shoulder is identified by the calculating the temperature difference of the XANES spectrum intensity. Decrease of pre-edge shoulder and peak intensity is observed only in the para-and ferro-electric phases and draw curves, not straight lines. The gradients for shoulder and pre-edge peak intensity are rich in a variety. The decrease in absorption of pre-edge peak and shoulder is speculated due to the shift from the off-centre position of the Zr atom with respect to the oxygen octahedron to center position. The Zr ion in the PbZrO 3 para-electric phase has same temperature behaviors of Ti ions in the ferroelectric perovskite.