Abstract Received his Ph.D. in Engineering from the University of Tokyo in 2009. From 2009, he worked as an assistant professor at synchrotron radiation facility, Photon Factory, the High Energy Accelerator Research Organization (KEK), and from 2014, he was a project lecturer at the University of Tokyo. Since 2017, he has been with NIMS. At synchrotron radiation facilities, he has advanced the development of cutting-edge measurement techniques, particularly in resonant X-ray scattering, imaging techniques, and time-resolved measurement methods. By elucidating electronic states through X-ray absorption and scattering, he promotes research on emergent properties in strongly correlated electron oxide systems, magnetic skyrmions, topological materials, and altermagnet materials.35Team Leader, Synchrotron Radiation Imaging Team, Center for Basic Research on Materials (CBRM),Research on magnetic materials using synchrotron radiation imaging is an advanced technology for precisely analyzing the magnetic properties of materials at the nanoscale. Synchrotron radiation, with its significantly higher energy and brightness compared to in-house X-rays, allows for detailed visualization of the internal structures and properties of materials. When applied to magnetic material research, this technology enables the observation and analysis of fine structures, magnetic domain dynamics, and magnetic anisotropy at the nanoscale. In magnetic material research using X-ray absorption, X-ray magnetic circular dichroism (XMCD), where the absorption of circularly polarized X-rays varies depending on the direction of the magnetic moment, is utilized to visualize microscopic images of magnetic materials by obtaining spatial distributions of absorption. We have been developed measurement systems such as the scanning X-ray microscopy (SXM) method, which acquires microscopic images by focusing X-rays using a Fresnel zone plate and scanning the sample, and the coherent diffraction imaging (CDI) method, which utilizes the high coherence of synchrotron radiation X-rays. These techniques have advanced research on visualizing magnetic skyrmions and topological materials, contributing to the investigation of emergent physical properties. Recently, it has been demonstrated that not only ferromagnetic materials but also antiferromagnetic materials, where magnetic moments cancel each other out, can be visualized by XMCD [1,2]. In this presentation, I will introduce recent research on magnetic materials using synchrotron radiation imaging.[1] Y. Yamasaki, H. Nakao, and T. Arima, J. Phys. Soc. Jpn. 89, 083703 (2020)[2] M. Kimata, Y. Yamasaki et al., Nature Communications 12, 5582 (2021)National Institute for Materials Science (NIMS)Synchrotron Radiation Imaging for Magnetic Materials Research Yuichi YamasakiNIMS Talk: S2-4
元のページ ../index.html#35