Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Correlated Electrons: Heavy Fermions
TT 8.2: Vortrag
Montag, 27. März 2006, 14:45–15:00, HSZ 301
Electronic properties of a*-oriented thin films of the Heavy-Fermion superconductor UPd2Al3 — •Michael Foerster, Martin Jourdan, and Hermann Adrian — J.-Gutenberg-Universität Mainz
By combining epitaxial thin films in a*-orientation of the hexagonal unit cell with optical lithography, we were able to perform precision measurements of temperature dependent resistivity and Hall effect. In contrast to the isostructural, isoelectronical UNi2Al3, no dependence of the superconducting transition on the current direction was observed. Also the Hall measurements show only a small anisotropy, and the low temperature behaviour can be understood using Fermi liquid theory.
Additionally, resonant magnetic x-ray scattering confirmed the existence of complete long range magnetic order in the samples, proving the high quality of our thin films. Tunneling experiments in a*-direction are of high interest to further investigate the symmetry of the unconventional sc-order parameter in this model system for Heavy-Fermion superconductivity. First results of such experiments will be presented.