Brozyniak A, Mendirek G, Hohage M, Navarro-Quezada A, Zeppenfeld P
Institute of Experimental Physics, Johannes Kepler University, Altenberger Str. 69, 4040 Linz, Austria.
Institute of Semiconductor and Solid State Physics, Johannes Kepler University, Altenberger Str. 69, 4040 Linz, Austria.
Rev Sci Instrum. 2021 Feb 1;92(2):025105. doi: 10.1063/5.0039608.
We present a compact in situ electromagnet with an active cooling system for use in ultrahigh vacuum environments. The active cooling enhances the thermal stability and increases the electric current that can be applied through the coil, promoting the generation of homogeneous magnetic fields, required for applications in real-time deposition experiments. The electromagnet has been integrated into a reflectance difference magneto-optic Kerr effect (RD-MOKE) spectroscopy system that allows the synchronous measurement of the optical anisotropy and the magneto-optic response in polar MOKE geometry. Proof of principle studies have been performed in real time during the deposition of ultra-thin Ni films on Cu(110)-(2 × 1)O surfaces, corroborating the extremely sharp spin reorientation transition above a critical coverage of 9 monolayers and demonstrating the potential of the applied setup for real-time and in situ investigations of magnetic thin films and interfaces.
我们展示了一种带有主动冷却系统的紧凑型原位电磁铁，用于超高真空环境。主动冷却提高了热稳定性，并增加了可通过线圈施加的电流，促进了均匀磁场的产生，这是实时沉积实验应用所必需的。该电磁铁已集成到反射率差磁光克尔效应（RD-MOKE）光谱系统中，该系统允许在极化MOKE几何结构中同步测量光学各向异性和磁光响应。在Cu(110)-(2×1)O表面上沉积超薄镍膜的过程中实时进行了原理验证研究，证实了在9个单层的临界覆盖度以上存在极其尖锐的自旋重取向转变，并展示了所应用装置用于磁性薄膜和界面的实时原位研究的潜力。
