Japan STA Program: Novel Element-Specific Studies of Magnetic Materials

Gofron 9704194该奖项支持日本科学技术厅为Kazimierz Gofron博士提供的为期24个月的博士后奖学金，他在日本神谷县的日本原子能研究所工作。Gofron博士将与Spring-8设备的首席科学家Jun‘ichiro Mizuki博士合作开展一个名为“磁性材料的新型元素特定研究”的研究项目。这项拟议的研究将使用磁性圆X-射线二向色性技术(MCXD)，结合光电子能谱和传统的磁探头来研究磁光材料的元素特定磁性。这项新颖的、高分辨率的磁学研究将同时关注空态和占位电子态。还将注意轨道的特殊性。在这些同步辐射实验中，偏振的x射线光子将被用作元素敏感的磁探针，以精确地监测磁光材料中特定原子物种的电子结构。由于磁光材料目前被用于数据存储，因此特别感兴趣的是具有大克尔效应的材料，即入射线偏振光的偏振平面的旋转。这项研究的最重要目标之一是更好地了解个别化学物种如何对磁性和磁光响应做出贡献，并深入了解给定原子物种的每个轨道如何对磁光响应做出贡献。***

Gofron 9704194 This award supports a 24 month Science and Technology Agency of Japan (STA) Postdoctoral Fellowship for Dr. Kazimierz Gofron at the Japan Atomic Energy Research Institute (JAERI), Kamigori, Japan. Dr. Gofron will work with Dr. Jun'ichiro Mizuki, Lead Scientist at the Spring-8 Facility, on a research project entitled, "Novel Element-Specific Studies of Magnetic Materials." The proposed research will use a magnetic circular x-ray dichroism technique (MCXD) in conjunction with photoemission and conventional magnetic probe to study the element specific magnetism of magneto- optic materials. The novel, high-resolution magnetic study will focus on both the empty and occupied electronic states. Attention will also be paid to orbital specificity. In these synchrotron radiation experiments the polarized x-ray photons will be used as an element sensitive magnetic probe for precisely monitoring the electronic structure of specific atomic species in magneto-optic material. As magneto-optic materials are currently used in data storage, of particular interest are materials with a large Kerr effect, the rotation of the plane of polarization of incident linearly polarized light. One of the foremost goals of the research is to better understand how individual chemical species contributes to magnetism and magneto-optic response, as well as obtain insight as to how each orbital of a given atomic species contributes to the magneto-optic response. ***