Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.3: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P2
de Haas-van Alphen oscillations in (La,Ce)TiGe3 — R. Seerig1,5, •M. Uhlarz1, W. Kittler2, V. Fritsch2, O. Stockert3, T. Förster1, P. Canfield4, J. Wosnitza1,5, and H. v. Löhneysen2 — 1Hochfeld-Magnetlabor Dresden (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2Karlsruher Institut für Technologie, 76049 Karlsruhe, Germany — 3Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany — 4Ames Laboratory, US DOE, and Dept. of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA — 5Institut für Festkörperphysik, TU Dresden, 01062 Dresden, Germany
CeTiGe3 is one of the few Kondo-lattice compounds which order ferromagnetically (TC ≈ 14 K); LaTiGe3 may be used as its nonmagnetic reference, since both compounds crystallize in the hexagonal perovskite structure [1, 2]. We report on de Haas-van Alphen (dHvA) oscillations in single crystals grown from Ge flux, measured in magnetic fields up to 13 T in a cantilever-type torque magnetometer. We found four dHvA frequencies ranging from 60 T to 4300 T, with effective masses between 0.31 m0 and 1.31 m0, featuring a comparatively weak angular dependence. Further, we give an interpretation of our results on the basis of DFT calculations of the electronic bandstructure of LaTiGe3.
[1] P. Manfrinetti et al., Solid State Commun. 135 (2005) 444
[2] W. Kittler et al., Phys. Rev. B 88 (2013) 165123