Berlin 2005 – scientific programme
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TT: Tiefe Temperaturen
TT 1: Superconductivity - Fabrication, Technical Optimization and Characterization
TT 1.4: Talk
Friday, March 4, 2005, 11:00–11:15, TU H104
Preparation and characterization of UPd2Al3 thin films in (100) orientation — •Michael Foerster, Christian Herbort, Martin Jourdan, and Hermann Adrian — J.-Gutenberg-Universität Mainz
We prepared for the first time high quality thin films of the Heavy-Fermion superconductor UPd2Al3 in a*-axis orientation employing MBE methods. The natural (001) growth direction can be changed to (100) by using YAlO3 (010) and (112) substrates. The samples were characterized in respect of their crystalline and superconducting properties. Buffer layers of naturally a*-axis oriented UNi2Al3 with thickness ≈ 100Å resulted in clearly improved film quality. These new samples enable tunneling experiments on UPd2Al3 in a*-axis direction, which are of high interest to further investigate the symmetry of the unconventional sc-order parameter in this model system for Heavy-Fermion superconductivity.