Berlin 2005 – wissenschaftliches Programm
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MA: Magnetismus
MA 29: Magnetische Materialien
MA 29.1: Vortrag
Dienstag, 8. März 2005, 15:15–15:30, TU A060
ZnO-based diluted magnetic semiconductors — •Alexei Nefedov1, Numan Akdogan1, Hartmut Zabel1, and Hans-Werner Becker2 — 1Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany — 2Ionenstrahlenphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany
Diluted magnetic semiconductors (DMS) have attracted much interest in recent years because of the possibility to utilize both, the charge and spin degrees of freedom in a single substance. Therefore, there is a strong interest to synthesize a ferromagnetic DMS whose Curie temperature is above room temperature. Since it was predicted that 3d transition metal atoms can order ferromagnetically in the ZnO matrix, further investigations on the feasibility of ZnO-based DMSs are of great interest. We report on studies of the magnetic properties of ZnO films doped with Co, Mn and Fe using ion implantation techniques. Data obtained by MOKE, SQUID, and x-ray resonant magnetic scattering (XRMS) will be presented. The Curie temperature dependence of ZnO-based DMS on different parameters (implantation dose, structural quality, annealing) will be reported. This work is supported by BMBF through the project 03ZAE8BO.N.A. acknowledges a fellowship through the International MPI Research School No-dqSurMatNo-dq.