DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2003 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MA: Magnetismus

MA 28: Hauptvortrag Rüdiger

MA 28.1: Invited Talk

Friday, March 28, 2003, 10:15–10:45, HSZ/03

Room temperature spin polarization of epitaxial half-metallic CrO2(100) and Fe3O4(111) films — •U. Rüdiger1, Y. Dedkov2, M. Fonine2, C. König2, and G. Güntherodt21Fachbereich für Physik, Universität Konstanz, 78457 Konstanz — 2II. Physikalisches Institut, RWTH Aachen, 52056 Aachen

The intriguing feature of the materials class of half-metallic ferromagnets (HMF) is metallic conductivity for one spin component and insulating behavior for the other one. The theoretically predicted 100% spin polarization (SP) at EF of HMFs make them promising materials for magnetoeletronic and spintronic devices. The spin-dependent electronic structure of thin epitaxial films of Fe3O4(111) and CrO2(100) has been investigated at room temperature (RT) by means of spin- and energy-resolved photoemission spectroscopy. Epitaxial Fe3O4(111) films have been grown on W(110) and Al2O3(1120) substrates by oxidizing epitaxial Fe(110) films. These films show near EF a maximum SP of -(80±5)% at RT [1]. Epitaxial CrO2(100) films have been deposited on TiO2(100) substrates by a chemical vapor deposition technique. An extraordinary high SP of about (95±5)% was found at EF at RT [2].

[1] Yu. S. Dedkov, U. Rüdiger, and G. Güntherodt, Phys. Rev. B 65, 064417 (2002).

[2] Yu. S. Dedkov, M. Fonine, C. König, U. Rüdiger, G. Güntherodt, S. Senz, and D. Hesse, Appl. Phys. Lett. 80, 4181 (2002).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2003 > Dresden