Berlin 2005 – scientific programme
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MA: Magnetismus
MA 25: Kondo/Schwere-Fermionen
MA 25.2: Talk
Tuesday, March 8, 2005, 12:45–13:00, TU A060
Electronic transport properties of single crystalline UPt2Si2 — •A. Otop1, R.W.A. Hendrikx2, J.A. Mydosh2,3, and S. Süllow1 — 1IMNF, TU Braunschweig, Germany — 2Kamerlingh Onnnes Laboratory, Leiden University, The Netherlands — 3Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
We present a detailed study of the transport
properties of single crystalline tetragonal UPt2Si2, for
which we recently established the presence of crystallographic
disorder on the Pt/Si sublattice. We carried out resistivity
(ρ), magnetoresistrivity (MR) and Hall effect measurements
(RH) in the temperature range from 2 to 300 K and in magnetic
fields up to 5.5 T. In this range we observe a very pronounced
anisotropy between a and c axis behavior. While along the a
axis we find a common heavy fermion metallic resistivity, along
the c axis ρ is disorder dominated. From our MR data we
extract the magnetic scattering component of the electronic
transport properties. With our Hall effect data we establish the
metallicity for both crystallographic axes of our material. We
discuss the relevance of the crystallographic disorder for the
transport properties for this correlated electron material.
This work was supported by the DFG under Contract No. SU229/1-3.