Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.36: Poster

Freitag, 18. März 2011, 11:00–14:00, P2

UHV-chamber for broadband magneto-optical reflection and polarisation experiments — •Marc Tesch¹, Markus Gilbert¹, Hans-Christoph Mertins¹, Roman Adam², Herbert Feilbach², and Claus Michael Schneider² — ¹FH Münster, Stegerwaldstr.39, 48565 Steinfurt — ²FZ Jülich, IFF-9, 52425Jülich

A new UHV-chamber for magneto-optical reflectometry and polarimetry experiments is presented. It enables measurements from the VIS to the soft X-ray range, using xenon- and deuterium-lamps or synchrotron radiation. The samplemagnetisation is generated by a quadrupol-magnetometer via rotating 8 NdFeB-permanentmagnets. The magnetic field is tunable from -500 mT to +500 mT in longitudinal or tranversal geometry. This device avoids thermal load, sophisticated UHV-compatible water cooling and offers reflection- and scattering experiments in a wide angular range. The presented 5-axes-polarimeter allows simple intensity measurements as well as polarisation analysis of the light after interaction with the magnetized sample in L- and T-MOKE-geometry. Practical features are in-situ sample transfer, easy chamber alignment and compatibility to synchrotron radiation beamlines as well as to light sources in the laboratory.