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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.100: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

Magnetic and structural properties of Co-implanted ZnO films — •Numan Akdogan¹, Alexei Nefedov¹, Werner Becker², Rustam Khaibullin³, Lenar Tagirov^3,4, and Hartmut Zabel¹ — ¹Institut für Experimentalphysik IV, Ruhr-Universität Bochum — ²Institut für Physik mit Ionenstrahlen, Ruhr-Universität Bochum — ³Kazan Physical-Technical Institute of RAS — ⁴Kazan State University

The ZnO-based dilute magnetic semiconductors (DMSs), which can be formed by doping 3d transition metals in ZnO, offers an interesting combination of electrical, optical, and magnetic properties. Moreover, according to suggestion of Dietl [1], the ZnO-based DMSs can order ferromagnetically at room temperature. In this contribution we report on structural and magnetic properties of Co-doped ZnO. ZnO films were grown on sapphire via rf-sputtering and doped with Co-ions via ion implantation with energy of 40 keV and implantation dose in the range of 0.25-1.50*1017 ions/cm2. The structural characterization was carried out using synchrotron radiation at the HASYLAB and the DELTA. The magnetic properties were investigated using x-ray resonant magnetic scattering at BESSY. Magnetic dichroism was observed at the Co L2,3 edges, as well as at the O K edge at room temperature for the highest dose doped sample, indicative of a spin polarization of oxygen atoms in the host matrix. - Partial support by SFB 491, by RFBR (grant 04-02-97505), and by TUBITAK (project 104T176) is acknowledged. N. Akdogan acknowledges a fellowship through IMPRS-SurMat. 1. T. Dietl et al., Science 287, 1019 (2000).