Dresden 2011 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 44: Poster Session I

HL 44.51: Poster

Dienstag, 15. März 2011, 18:00–21:00, P3

Influence of the Mn-concentration on the magnetotransport properties of Cl-doped ZnMnSe — •Christian H. Will¹, Matthias T. Elm¹, Jörg Teubert¹, Peter J. Klar¹, and Michael Hetterich² — ¹1. Physikalisches Institut, Justus-Liebig-Universität, Heinrich-Buff-Ring 16, 35392 Giessen — ²Institut für Angewandte Physik, Universität Karlsruhe, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe

The incorporation of manganese ions in I_1-x-Mn_x-VI compounds provides a large localized magnetic moment due to their half-filled inner 3d-shell. Because manganese forms isovalent impurities, it does not affect the carrier concentration. By co-doping with Cl, the carrier concentration can therefore be tuned independently from the Mn content. In order to investigate the influence of the magnetic moment on the transport properties, ZnMnSe:Cl samples were grown by molecular beam epitaxy on undoped GaAs substrates. The samples belong to two different series. Within the first series, the amount of Cl dopants varies by a magnitude of about 10, while the Mn concentration is retained at x≈ 6%. In contrast, the Mn concentration of the samples in the second series alters from 0% to 2%, while the quantity of the carrier concentration is kept constant. The magnetotransport measurements were performed in a temperature range from 1.6 K to 285 K in fields up to 10 T and the results will be discussed.