Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 27: CE: Poster Session
TT 27.13: Poster
Mittwoch, 24. März 2010, 14:00–18:00, Poster D1
Sample preparation and magnetic properties of CeTiGe3 — •Wolfram Kittler1, Gerda Fischer1, Veronika Fritsch1, and Hilbert v. Löhneysen1,2 — 1Karlsruher Institut für Technologie, Physikalisches Institut, 76131 Karlsruhe, Germany — 2Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76131 Karlsruhe, Germany
CeTiGe3 crystallizes in the hexagonal BaNiO3-structure (space group hP10−P63/mmc), which is also known as hexagonal perovskite. We prepared polycrystals by conventional argon-arc melting with subsequent annealing and quenching in liquid nitrogen. The x-ray powder diffraction patterns showed no traces of impurity phases in our samples, however small deviations from the Curie-Weiss law might be attributed to some impurities still present in the sample. We present measurements of magnetization and electrical resistivity in the temperature range between 1.5 and 300 K in magnetic fields up to 5 T. The resistivity ratio at T = 1.5 K of RRR = 26, in comparison to the previously reported value of approximately 13 [1], confirms the rather good quality of our samples. The magnetization data show that CeTiGe3 is one of the rare ferromagnetic dense Kondo-lattice compounds with a Curie temperature of TC = 14 K and direction-average magnetic moment of 0.94 µB as inferred from the M(B) curves at B = 5 T for T = 5 K.
[1] P. Manfrinetti et al., Solid State Commun. 135, 444 (2005).