Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 32: Surface Magnetism and Spin Phenomena
O 32.4: Poster
Dienstag, 17. März 2015, 18:15–21:00, Poster A
Construction and realization of a 1K spin-polarized scanning tunneling microscope operable in a high magnetic field — Andreas Sonntag1, Jan Hermenau1, •Nadine Hauptmann2, and Alexander Ako Khajetoorians1,2 — 1Institute of Applied Physics, Jungiusstrasse 9A, 20355 Hamburg, Germany. — 2Institute for Molecules and Materials, Radboud Universiteit, 6500 GL Nijmegen, The Netherlands
Low-temperature scanning probe microscopy is a powerful method to explore the means of atomic-scale magnetism. In particular, this method has the potential of studying non-collinear magnetic structures on the cutting edge of magnetic material research, such as skyrmions [1], which are promising candidates for future application in data-storing and information-processing devices [2]. We present the design and setup of a home-built scanning tunneling microscope working at 1K based on a JT-stage with 4He, operating in a 9T out-of-plane magnetic field. The system is optimized for long hold times (∼7 days), and capable of spin-polarized measurements based on a robust tip/sample exchange mechanism. Additionally, the system features two additional chambers for preparation of magnetic material on both tip and sample.
[1] S. Heinze, K. von Bergmann, M. Menzel, J. Brede, A. Kubetzka, et al., Nature Phys. 7, 713 (2011). [2] J. Sampaio, V. Cros, S. Rohart, A. Thiaville, and A. Fert, Nature Nanotech., 8, 839 (2013).