Time-resolved scanning transmission x-ray microscopy studies of spin current induced manipulation of magnetization in nanostructures

该科学项目研究了自旋电流对纳米结构中磁化的超快速操纵。本研究探讨了自旋注入及其在金属顺磁体、无机和有机半导体以及单分子磁体薄膜中的时间演化。这项工作包括在斯坦福同步辐射实验室（SSRL）使用扫描透射x射线显微镜（STXM）进行样品制备、表征和时间相关磁化的直接成像。将对自旋极化的超快动力学及其符号进行成像。为此，将使用由皮秒自旋电流脉冲触发的磁激励。了解可能影响自旋注入的各种因素是在下一代无机和有机自旋电子技术中最终利用这一现象的先决条件。研究领域。x射线显微镜，凝聚态物理，表面科学，磁学，无机（配位）化学，分子磁学。

The scientific program investigates the ultra-fast manipulation of the magnetization in nanostructures by spin currents. The proposed research explores the spin injection and its temporal evolution into thin films of metallic paramagnets, inorganic and organic semiconductors, and single molecule magnets. The work includes the sample preparation, characterization, and the direct imaging of the time dependent magnetization using a scanning transmission x-ray microscope (STXM) at the Stanford Synchrotron Radiation Laboratory (SSRL). The ultrafast dynamics of spin polarization including its sign will be imaged. For that purpose magnetic excitations which are triggered by picosecond spin current pulses will be used. The understanding of various factors that may influence the spin injection is a prerequisite for the ultimate utilization of this phenomenon in next generation inorganic and organic spintronic technologies.Research field. X-ray microscopy, condensed matter physics, surface sciences, magnetism, inorganic (coordination) chemistry, molecular magnetism.