Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Poster Session

TT 71.5: Poster

Mittwoch, 18. März 2015, 15:00–18:00, Poster B

de Haas-van Alphen oscillations in (La,Ce)TiGe3 — •J. Grasemann1,2, M. Uhlarz1, W. Kittler3, V. Fritsch3,4, O. Stockert5, T. Förster1, J. Wosnitza1,2, and H. v. Löhneysen31Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2TU Dresden, 01062 Dresden, Germany — 3Karlsruhe Institute of Technology, 76049 Karlsruhe, Germany — 4Institut für Physik, Universität Augsburg, 86135 Augsburg — 5Max-Planck-Institute for Chemical Physics of Solids, 01187 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 same hexagonal perovskite structure [1, 2]. We report on angular-resolved de Haas-van Alphen oscillations in single crystals of CeTiGe3, LaTiGe3, and Ce0.1La0.9TiGe3 grown from Ge flux, measured in magnetic fields up to 13 T in a cantilever-type torque magnetometer. We found several dHvA frequencies, ranging in CeTiGe3 from 100 to 530 T and with effective masses around 0.7 m0, featuring a comparably weak angular dependence. Further, we give an interpretation of our results on the basis of DFT calculations of the electronic band structure of CeTiGe3 and LaTiGe3.

[1] P. Manfrinetti et al., Solid State Commun. 135 (2005) 444-448.

[2] W. Kittler et al., Phys. Rev. B 88 (2013) 165123

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