Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 43: Poster Session II - MA 141/144 (Surface Spectroscopy on Kondo Systems; Frontiers of Surface Sensitive Electron Microscopy; Methods: Scanning Probe Techniques+Electronic Structure Theory+Other; Time-Resolved Spectroscopy of Surface Dynamics with EUV and XUV Radiation; joined by SYNF posters)

O 43.17: Poster

Dienstag, 26. Februar 2008, 18:30–19:30, Poster F

A New Scanning Tunneling Microscope for Spin-Sensitive Measurements in Ultrahigh Vacuum, at Low Temperatures, and in High Magnetic Fields — •Mike Gyamfi, Stefan Meckler, Oswald Pietzsch, and Roland Wiesendanger — Institute of Applied Physics and Microstructure Advanced Research Center Hamburg, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany

To study the spin dependent local electronic structure of single magnetic nanowires and nanoislands a new scanning tunneling microscope with spin sensitivity has been developed.

The microscope is operated in a liquid helium bath cryostat with a base temperature of 5K and a superconducting magnet that provides a magnetic field in arbitrary direction to the sample. It is equipped with an inertial drive for tip coarse approach and an additional one for sample rotation. The latter one allows the preparation of samples directly in the microscope at cryogenic conditions. Furthermore, a tip exchange mechanism has been integrated that enables spin dependent measurements with magnetically coated tips.

The microscope, the ultrahigh vacuum system with the magnet cryostat, and first measurements are presented to demonstrate the functionality of the recently installed system.