权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of an UHV-infrared microscope and its application to solid state physics

超高真空红外显微镜的研制及其在固体物理中的应用

基本信息

批准号：
13354003
负责人：
NANBA Takao
金额：
$ 32.53万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

项目摘要

We have developed a new type of infrared microscope in ultra high vacuum (UHV), which works in the infrared to near infrared regions. The meaning of the term "in UHV" is that the all function of infrared microscope is installed in the UHV chamber and it works fully in operation by remote control out of the chamber. In general, infrared microscope requires us to change frequently the different kinds of suitable optical windows according to the spectroscopic regions in the infrared to near infrared. In a UHV microscope, we use only a thin diamond window, which is almost transparent in the whole wavelength region in order to seal the inner part of the microscope from the outside. Then, we don't need do any change of the optical window because all hardware of the microscope is installed in a UHV chamber. By use of new type of infrared microscope, we performed following subjects ;1.Study on the infrared spectrum due to the order-disorder phase transition of proton configuration in ice under high pressure.We found some new absorption peaks in the infrared reflection measurement under high pressure up to 8 GPa.2.Study on a change in the electronic state of CuIr_2Se_4 at high pressureCuIr_2Se_4 is known as an interesting material, which shows the crossover in physical properties from metal to insulator under high pressure around 5 GPa. We performed the infrared spectromicropscopic measurement under high pressure up to 10 GPa and found a clear change in the electronic state corresponding to the electronic phase transition.3.Infrared spectromicropscopic measurementGdRu_4P_<12> is one of the filled skutterudite compounds and shows an antiferromagnetic ordering below 22K. GdRu_4P_<12> requires an infrared spectromicropscopic measurement because it shows different physical properties at different local positions of the sample. We performed reflection measurement and clear change in the spectra due to the magnetic ordering.

我们研制了一种新型的超高真空红外显微镜，它工作在红外到近红外区域。“特高压内”是指红外显微镜的所有功能都安装在特高压室内，并在室外通过远程控制完全工作。一般来说，红外显微镜要求我们根据红外到近红外的光谱区域经常更换不同类型的合适的光学窗口。在超高真空显微镜中，我们只使用一个薄的金刚石窗口，它在整个波长范围内几乎是透明的，以便将显微镜的内部与外部密封。然后，我们不需要做任何改变的光学窗口，因为所有的硬件显微镜安装在一个超高真空室。利用新型红外显微镜，我们进行了以下研究：1.研究了高压下冰中质子组态的有序-无序相变引起的红外光谱，在高达8 GPa的高压下的红外反射测量中发现了一些新的吸收峰。2.研究了CuIr_2Se_4在高压下的电子态变化4被认为是一种有趣的材料，它显示了在5 GPa左右的高压下从金属到绝缘体的物理性质的交叉。我们在高压下进行了红外光谱测量，发现在10 GPa的高压下，电子相变对应的电子态发生了明显的变化。3.红外光谱测量GdRu_4P_3是<12>一种填充方钴矿化合物，在22 K以下表现出反铁磁有序。GdRu_4P_3<12>在样品的不同局部位置表现出不同的物理性质，因此需要红外光谱显微镜测量。我们进行了反射测量和由于磁有序的光谱的明显变化。