Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Halbleiterphysik

HL 9: Poster I

HL 9.39: Poster

Montag, 27. März 2006, 15:15–17:45, P3

Ferromagnetism in Zn(Mn,Sn)O and Zn(Mn,P)O films — •M. Diaconu¹, H. Schmidt¹, M. Fecioru-Morariu², G. Güntherodt², D. Spemann¹, H. Hochmuth¹, M. Lorenz¹, and M. Grundmann¹ — ¹Inst. für Exp. Physik II, Fakultät für Physik, Uni. Leipzig, Linnestrasse 3-5, 04103 Leipzig — ²II. Physikalisches Institut, RWTH Aachen, Physikzentrum Melaten, Huyskensweg Turm 28B, 52074 Aachen

Ferromagnetic behavior was observed in Zn(Mn,Sn)O films below 250 K and in Zn(Mn,P)O films above 300 K, with a maximum magnetic moment of 0.045 µ_B per Mn ion at room temperature. The films have a Mn content around 5 at% and P content around 0.1 and 0.5 at% or Sn content around 0.05 at% and were grown by pulsed laser deposition on a-plane sapphire. The film composition was determined by Rutherford backscattering and particle induced X-ray emission. The presence of secondary phases was investigated by X-ray diffraction. We also investigated the effect of annealing at 800^∘C in N₂ atmosphere and we observed that after 2 hours annealing the films became paramagnetic at all temperatures and electrically insulating.