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Electron holographic studies of irradiation damage in BaTiO3

机译：BaTiO3中辐照损伤的电子全息研究

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摘要

Using an electron holographic technique, we investigated the charging-up phenomena of BaTiO3 particles under electron beam irradiation. BaTiO3 particles were confirmed to be charged up by electron irradiation just after insertion in a transmission electron microscope (TEM). However, the amount of the electric charge induced by electron irradiation was found to decrease by further irradiation in a TEM. After irradiating for 1.5 h, about half of the electrical charge was lost compared with that in the initial state. This implies that the electric resistivity of the particle decreased upon irradiation. In addition, this reduction process of the resistivity due to irradiation was confirmed to be an irreversible reaction. It could be concluded that the reduction of resistivity is attributed to the generation of oxygen vacancies due to the irradiation. The electron irradiation technique can be considered to be a new modification method of conductivity in BaTiO3-based materials.
机译：使用电子全息技术，我们研究了电子束辐照下BaTiO3颗粒的充电现象。刚插入透射电子显微镜（TEM）后，BaTiO3颗粒通过电子辐照被证实带电。然而，发现通过在TEM中进一步照射，由电子照射引起的电荷量减少。照射1.5小时后，与初始状态相比损失了大约一半的电荷。这意味着粒子的电阻率在照射时降低。另外，证实了由于辐照引起的电阻率的这种降低过程是不可逆的反应。可以得出结论，电阻率的降低归因于辐照引起的氧空位的产生。电子辐照技术可以被认为是BaTiO3基材料电导率的一种新的改性方法。

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