Low-temperature scanning tunneling microscope with a superconducting magnet

带超导磁体的低温扫描隧道显微镜

• 批准号: 534143996
• 金额: --
• 依托单位: Forschungsgruppe Experimentalphysik
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/534143996?language=en
• 关键词: Low; temperature; scanning; tunneling; microscope

A commercial ultra-high vacuum low-temperature scanning tunneling microscope with a superconducting magnet is requested to investigate the magnetic properties and the switching dynamics of nano-objects, primarily individual molecules with a magnetic moment, adsorbed on metal surfaces. The instrument has a base temperature of 0.4 K and is equipped with a superconducting magnet that can provide a variable magnetic field of up to 11 T in the direction perpendicular to the sample. The microscope is complemented by a preparation chamber to prepare clean samples in situ. This instrumentation shall be used to explore three axes of research: (i) the spin-state switching of individual molecules, (ii) the magnetic properties of multinuclear molecular compounds, and (iii) the switching dynamics of magnetic molecules and other nano-systems. The instrument is particularly adapted to precisely characterize magnetic systems owing to the 120 µeV spectroscopic energy resolution and the variable magnetic field. The latter also allows polarizing spin systems, including clusters of magnetic atoms at the tip of the microscope to be sensitive to spin polarized currents.

一个商业超高真空低温扫描隧道显微镜与超导磁体的要求，以调查的磁性和纳米物体的开关动力学，主要是单个分子的磁矩，吸附在金属表面。该仪器的基础温度为0.4 K，并配备了超导磁体，可在垂直于样品的方向上提供高达11 T的可变磁场。该显微镜配备了一个制备室，用于原位制备干净的样品。该仪器将用于探索三个研究方向：（一）单个分子的自旋状态转换，（二）多核分子化合物的磁性，以及（三）磁性分子和其他纳米系统的转换动力学。由于120 µeV的光谱能量分辨率和可变磁场，该仪器特别适合精确表征磁性系统。后者还允许极化自旋系统，包括显微镜尖端的磁性原子簇对自旋极化电流敏感。