Dresden 2003 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 16: Hauptvortrag Dietl
HL 16.1: Hauptvortrag
Dienstag, 25. März 2003, 10:15–11:00, POT/81
Manipulation with spin ordering in ferromagnetic semiconductors — •Tomasz Dietl — Institute of Physics, Polish Academy of Sciences al. Lotników 32/46, PL-02668 Warszawa, Poland
Recent advances in the field of carrier-controlled ferromagnetism in Mn-based II-V and II-VI diluted magnetic semiconductors and their nanostructures will be reviewed with a focus on the phenomena important for prospective spintronic devices. The experiments demonstrating the isothermal switching of ferromagnetism by light and electric field will be presented along with the results showing the tailoring of domain structures and magnetic anisotropy by strain engineering and confinement. Novel methods enabling patterning of quantum magnetic dots and reversal of their magnetization will be put forward. Recent progress in search for semiconductors with TC above room temperature and hopes associated with compounds containing magnetic ions other than Mn will be presented.
Work done in collaboration with H. Boukari, J. Cibert, D. Ferrand, P. Kossaki, J. König, A.H. MacDonald, F. Matsukura, H. Ohno, and M. Sawicki. References: T. Dietl et al., Science287, 1019 (2000); Phys. Rev. B 63, 195205 (2001); ibid. 64, 241201(R) (2001); ibid. 66, 033203 (2002); H. Ohno et al., Nature 408, 944 (2000); H. Boukari et al., Phys. Rev. Lett. 88, 207204 (2002).