Berlin 2008 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)
MA 18.29: Poster
Dienstag, 26. Februar 2008, 15:15–18:30, Poster E
Crystal electric field levels in Ho2PdSi3 studied by inelastic neutron scattering in magnetic fields — •Fei Tang1, Matthias Frontzek1, Michael Loewenhaupt1, Astrid Schneidewind1,2, Peter Link2, Holger Bitterlich3, and Günter Behr3 — 1IFP, TU Dresden, D-01062 Dresden, Germany — 2FRM-II, TU München, D-85375 Garching, Germany — 3IFW Dresden, D-01069 Dresden, Germany
The series R2PdSi3 (R = rare earth), has been found to exhibit rich magnetic phenomena resulting from the interplay between RKKY interaction, crystal-electric field effects and geometric frustration. Except for the Ho2PdSi3 compound the second order crystal electric field parameter dominates the magneto-crystalline anisotropy .
The Ho2PdSi3 compound which orders antiferromagnetically at TN = 7.7K offers therefore the opportunity to study the influence of the higher order crystal electric field parameters. We performed inelastic neutron scattering experiments on a large Ho2PdSi3 single crystal in magnetic fields up to 13T at the cold triple axis spectrometer (PANDA, FRM-II). In applied magnetic fields above the critical field for the transition into FM induced state, the crystal electric field levels undergo Zeeman splitting; and the energy shift varies from approx. 0.1meV/T to 0.3meV/T, implying the influence of the higher order crystal field parameters.
In this contribution we will present and discuss the results of the inelastic neutron scattering experiments and give a proposal for the crystal electric field level scheme.