Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 32: Postersession II: Spinstruct./Phase Trans. (1-10); Spinelectronics (11-15); Thin Films (16 - 36); Particles/Clusters (37-45); Multiferroics (46-54); Spindynamics/Spin Torque (55 - 76); Post Deadlines (77-79)

MA 32.35: Poster

Freitag, 29. Februar 2008, 11:15–14:00, Poster E

Low temperature ion bombardment combined with in-situ ac-susceptibility measurements — •Moritz Trautvetter, Ulf Wiedwald, and Paul Ziemann — Universität Ulm

As has been demonstrated previously, ion bombardment of magnetic films at optimized temperatures allows fine tuning of various magnetic properties like Curie-temperature, hysteretic behavior, exchange bias fields as well as magnetically relevant structural phase transitions. In many cases, it is desirable to find a relation between certain types of defects or of disorder and corresponding changes of a specific magnetic property. For this purpose, a new low temperature (T > 6K) ac-susceptometer was developed and combined with the beam-line of a 300 keV ion accelerator. The design of this system will be introduced and its performance demonstrated by first measurements on FePt films and nanoparticles.