Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 25: Correlated Electrons - Poster Session
TT 25.72: Poster
Mittwoch, 29. März 2006, 14:30–18:30, P1
Magnetic order in thin films of the heavy fermion superconductor UNi2Al3 — •Martin Jourdan1, Andrey Zakharov1, Arno Hiess2, Tim Charlton3, Nick Bernhoeft4, Danny Mannix5, and Hermann Adrian1 — 1Institut für Physik, Johannes Gutenberg Universität, 55099 Mainz, Germany — 2Institut Laue Langevin, BP 156, F-38042 Grenoble, France — 3Rutherford Appelton Laboratory, ISIS facility, UK — 4Dépt. de Recherche Fond. sur la Matière, France — 5XMaS UK CRG beamline, ESRF, BP 220, F-38043 Grenoble Cedex 9, France
In the case of the heavy fermion superconductor UNi2Al3 a strong interconnection between its superconducting and magnetic properties is expected. Thus a careful characterization of the magnetic state of thin film samples primarily prepared for the investigation of the unconventional superconducting properties of this compound is necessary.
Resonant magnetic x-ray scattering was employed to investigate the magnetic state of epitaxial a* oriented thin films UNi2Al3. The observed incommensurate propagation vector as well as the Neél temperature correspond to
those of bulk samples. The 1200Å film shows magnetic order with a correlation length > 800 Å parallel to the growth axis. Out of the three possible magnetic domains the one with the moment direction perpendicular to the film surface is not realized.