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MA: Magnetismus

MA 13: Poster:Schichten(1-23),Spinabh.Trsp(24-41),Exch.Bias(42-56),Spindyn.(57-67),Mikromag.(68-76),Partikel(77-90),Spinelektr.(91-97),Elektr.Theo.(98-99),Mikromag+PhasÜ+Aniso.(100-105),Magn.Mat.(106-118),Messmethod.(119-121),Obflm.+Abbverf.(122-123)

MA 13.2: Poster

Dienstag, 9. März 2004, 15:00–19:00, Bereich A

Giant 2p3d Resonant Photoemission of Half-Metallic Ferromagnetic CrO2 — •Yuriy Dedkov1, Mikhail Fonin1, Martin Sperlich1, Christian König1, Alexandr Vinogradov2, Denis Vyalikh3, Serguei Molodtsov3, Ulrich Rüdiger4, and Gernot Güntherodt11II. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule Aachen, D-52056 Aachen, Germany — 2Institute of Physics, St.-Petersburg State University, 198904 St.-Petersburg, Russia — 3Institut für Festköperphysik, Technische Universität Dresden, D-01062 Dresden, Germany — 4Fachbereich Physik, Universität Konstanz, D-78457, Konstanz, Germany

The electronic structure of high quality half-metallic ferromagnetic CrO2(100) films was investigated by means of x-ray adsorption spectroscopy (XAS) and resonance photoelectron spectroscopy (Res-PES) performed at the O K- and Fe L2,3-edges. First principles calculations made on the basis of the local spin-density approximation (LSDA and LSDA+U) to the density-functional theory have been carried out to study the influence of the electron correlation effects on the electronic structure of CrO2. Recent resonance photoelectron spectroscopy data emphasize the strength of 2p-3d resonance photoemission for studying the electronic structure of correlated systems, for example CrO2. The present spectroscopy data (XAS and Res-PES) show that band structure calculations on the basis of the LSDA+U approach are more suitable for the description of the electronic structure of half-metallic CrO2.

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DPG-Physik > DPG-Verhandlungen > 2004 > Regensburg