Fermiology and spin densities from x-ray scattering

磁性在许多材料的性质中扮演着令人着迷的角色。除了能够产生一个可以观察或使用的外部磁场外，磁性还可以决定材料本身的其他性质。在我们的项目中，我们将研究材料，这些材料背后的磁性背后的潜在物理还知之甚少。我们还将对未来可能用于技术发展的材料中被称为自旋极化的性质进行准确测量。我们工作的另一个主要方面是进行有助于我们理解超导电性的实验。在我们的项目中，我们将研究一组这些材料，其中目前对基本电子结构存在重大争议，使用不同的实验技术会发现不同的结果。我们的实验将有助于解决这些问题。为了提供所需的灵敏度，这些实验都要求我们使用X射线来测量磁性的特定细节。获得具有足够强度和所需特殊性质的X射线的唯一方法是使用同步加速器源。在世界范围内，有几个这样的产品。为这些实验选择同步加速器是基于日本Spring-8同步加速器的特殊实验设备和可用的X射线能量。

Magnetism plays a fascinating role in the properties of many materials. As well as being able to create an external magnetic field that can be observed or used, magnetism can determine other properties of the material itself. In our project we will be studying materials where the underlying physics behind these magnetic properties is as yet poorly understood. We will also making accurate measurements of property known as spin polarisation, in materials that could be of use for technological development in the future. The other main aspect of our work is to perform experiments that should contribute to our understanding of superconductivity. In our project we will study a set of these materials where there is currently significant controversy surrounding the underlying electronic structure, with different results being found using different experimental techniques. Our experiments will help to resolve these problems.In order to provide the sensitivities required, these experiments all require us to use x-rays to measure specific details of the magnetic properties. The only way to obtain x-rays of sufficient intensity and with the particular properities required, is to use a synchrotron source. There are a few of these available world-wide. The choice of synchrotron for these experiments was based on the particular experimental facilities and x-ray energy available at the SPring-8 synchrotron in Japan.