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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.