Regensburg 2002 – wissenschaftliches Programm

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MA: Magnetismus

MA 10: Poster : Dünne Schichten(1-21),Spinabh.Transp.(22-39),Exch.Bias(40-51),Spindyn.(52-55),Mikromag.(56-66),Partikel(67-74),Abb.Verf.(75-77),Oberfl.+Spinelektr.+Elektr.Theo+Mikromag(75-87),PÜ+Aniso+Werkst/Leg.(88-103),Mol.Mag.+N-dim+Messm.+Postdead(104-111

MA 10.8: Poster

Dienstag, 12. März 2002, 15:00–19:00, Bereich A

Room Temperature Observation of High Spin Polarization of Epitaxial CrO₂(100) Films at E_F — •C. König¹, Yu. S. Dedkov¹, M. Fonine¹, U. Rüdiger¹, G. Güntherodt¹, S. Senz², and D. Hesse² — ¹II. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, D-52056 Aachen, Germany — ²Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle/Saale, Germany

Epitaxial CrO₂(100) films have been grown on TiO₂(100) substrates by a chemical vapor deposition (CVD) technique. The surface and interface properties of the CrO₂ (100) films were studied by scanning tunneling microscopy (STM) and transmission electron microscopy (TEM). The spin-dependent electronic structure of CrO₂(100) films have been investigated at room temperature by means of spin- and angle-resolved photoemission spectroscopy. At the Fermi level E_F an energy gap of about 2 eV was observed for spin-down electrons and a spin polarization of about 95% was found at 293 K.