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Dresden 2006 – scientific programme

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HL: Halbleiterphysik

HL 9: Poster I

HL 9.39: Poster

Monday, March 27, 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. Grundmann11Inst. 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 µB 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 800C in N2 atmosphere and we observed that after 2 hours annealing the films became paramagnetic at all temperatures and electrically insulating.

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