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.

需要一台带有超导磁体的商用超高真空低温扫描隧道显微镜来研究纳米物体（主要是吸附在金属表面上具有磁矩的单个分子）的磁性和开关动力学。该仪器的基础温度为0.4 K，配备超导磁体，可在垂直于样品的方向提供高达11 T的可变磁场。显微镜配有制备室，可在原位制备干净的样品。该仪器将用于探索三个研究方向：（i）单个分子的自旋态转换，（ii）多核分子化合物的磁性，以及（iii）磁性分子和其他纳米系统的转换动力学。由于 120 µeV 光谱能量分辨率和可变磁场，该仪器特别适合精确表征磁系统。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。