Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 25: Correlated Electrons - Poster Session

TT 25.84: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

The quantum-functional properties of Pr_1−x−yLa_xPb_yTe — •T. Herrmannsdörfer¹, A. D. Bianchi¹, T. P. Papageorgiou¹, Y. Skourski², and J. Wosnitza¹ — ¹Institut Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Rossendorf, D-01314, Dresden, Germany — ²Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, D-01069 Dresden, Germany

The intermetallic compound Pr_1−x−yLa_xPb_yTe shows a wide spectrum of physical phenomena. Depending on the metallurgical composition as function of x and y, the compound changes its behavior from nuclear magnetic order to super- or semiconductivity. In addition, there are interesting interplay effects between these ground states. In consequence, Pr_1−x−yLa_xPb_yTe may serve as an promising material for quantum-computing applications. Here we report our results of the superconducting and magnetic properties investigated in a wide temperature, 0.0001 K ≤ T ≤ 350 K, and field range, 0 ≤ B ≤ 50 T. We present data of the ac susceptibility, magnetization, and electrical conductivity of various compositions x and y, e.g. turning the system from a van Vleck paramagnet, x = y = 0 into either a superconductor, x ≥ 0.5, or a doped semiconductor, y ≥ 0.999. Recently we have measured the magnetization of y = 0, 0.50, and 0.90 in pulsed magnetic fields up to 50 T in order to investigate the influence of doping on the crystalline electrical-field properties.