Control of physical properties by means of photocarrier injection

我们的目标是利用光载流子注入(PCI)方法来控制氧化膜的物理性质。在VO_2/TiO_2(001)体系中，由于薄膜与衬底的界面处形成了固溶体，因此用PCI法控制薄膜的物理性能很重要的是形成锐利的界面。在SnO_2系统中，在紫外光照射下观察到了很大的电阻变化。我们已经开发了我们将应用PCI方法的材料。通过发展一种制备方法，我们成功地获得了高质量的CrO_2薄膜，并在霍兰特型钛氧化物中发现了室温铁磁行为。

We have aimed to control the physical properties of oxide films by using photocarrier injection (PCI) method. In VO_2/TiO_2(001) system, it is found that making a sharp interface is important to control the physical properties by PCI method, because the solid solution is formed at the interface between the film and the substrate. In SnO_2 system, a large change in resistance is observed under an ultraviolet light irradiation. We have developed the materials to which we would apply the PCI method. We have successfully obtained a high quality CrO_2 thin film by developing a preparation method and also found a room temperature ferromagnetic behavior in hollandite-type Ti oxide compounds.