Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 13: Poster Ia: Electron Theory (1); Magnetic Imaging (2,3); Thin Films (4-25); MSMA (26-33); Magn. Semiconductors (34-42); Magn. Half Metals and Oxides (43-60)

MA 13.41: Poster

Dienstag, 24. März 2009, 10:15–13:00, P1A

Magneto-optical spectroscopy of europium telluride and europium hydride — •Bodo Lobbenmeier, Helge Schröter, Peter Clodius, and Joachim Schoenes — Institut für Physik der Kondensierten Materie, TU Braunschweig, Germany

Magneto-optical measurements on EuTe and EuH₂ have been used to investigate the electronic properties of the highly localized 4-f electrons of europium, i.e. the transition from the 4-f to the 5-d state. Since a magnetic transition from a canted antiferromagnetic to a spin-aligned phase is expected near 7 T in EuTe, the magnetic field dependencies have been measured up to 10 T. The Kerr spectroscopic investigations have been made in the energy range from 1.8 eV to 4.3 eV. The spectra for EuTe have been compared with data obtained for EuH₂ which has a similar gap than EuTe. This films of EuH₂ have been grown by pulsed laser deposition and show a transition to a ferromagnetic phase at 18 K.