Regensburg 2007 – scientific programme
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MA: Fachverband Magnetismus
MA 23: Micro- and Nanostructured Magnetic Materials I
MA 23.9: Talk
Thursday, March 29, 2007, 12:15–12:30, H22
Magnetic Patterning by Focused Ion Beam Irradiation — •Stefan Tibus1, Denys Makarov1, Charles T. Rettner2, Thomas Thomson3, Bruce D. Terris3, and Manfred Albrecht1 — 1University of Konstanz, Department of Physics, D-78457 Konstanz, Germany — 2IBM Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA — 3Hitachi San Jose Research Center, 650 Harry Road, San Jose, CA 95120, USA
The magnetic properties, i.e. magnetization, coercivity and initially perpendicular magnetic anisotropy, of a granular CoCrPt film can be tuned by Ga irradiation, depending on exposure dose [1]. Focused ion beam irradiation is used to generate a periodic pattern of exposed strips which are magnetically soft, separated by magnetically hard unexposed areas [2]. Investigation with magnetic force microscopy and magneto-optical Kerr effect measurements show several stabilization regions of magnetic domain configurations, which are due to strong magnetic coupling between the strips. The magnetic reversal behavior and domain configurations are investigated by micromagnetic simulations and a comparison with the experimental findings is presented.
- [1] Charles T. Rettner et al, IEEE Trans. Magn. 38, 1725–1730 (2002)
- [2] Manfred Albrecht et al, Appl. Phys. Lett. 83, 4363–4365 (2003)