Berlin 2005 – wissenschaftliches Programm

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MA: Magnetismus

MA 2: Magnetische dünne Schichten I

MA 2.8: Vortrag

Freitag, 4. März 2005, 12:15–12:30, TU H1012

Fe Spin Structure During Magnetization Reversal of Exchange Biased Fe/MnF₂ — •B. Sahoo¹, J. Eisenmenger^2,3, W. A. A. Macedo⁴, R. Röhlsberger⁵, W. Keune¹, V. Kuncser^1,6, M. D. Martins⁴, J. Nogués⁷, I. K. Schuller², Kai Liu⁸, I. Felner⁹, K. Schlage¹⁰, O. Leupold¹¹, and R. Rüffer¹¹ — ¹Uni. Duisburg-Essen, Germany — ²Uni. California-San Diego, USA — ³Uni. Ulm, Germany — ⁴CDTN, Brazil — ⁵HASYLAB@DESY, Germany — ⁶NIPM, Romania — ⁷ICREA and Uni. Barcelona, Spain — ⁸Uni. California-Davis, USA — ⁹Hebrew University, Israel — ¹⁰Uni. Rostock, Germany — ¹¹ESRF, France

We have investigated the local spin structure of Fe in Fe/MnF₂ during magnetization reversal. The nuclear resonant scattering technique allowed for the determination of the depth dependent magnetic hyperfine field and Fe spin structure, and their temperature dependence. The obtained Fe spin structure will be discussed. Interestingly, during the magnetization reversal process the spins rotate (in-plane) up to an angle of 45^∘ away from the applied field direction. By further decreasing the negative field the Fe spins jump from the 45^∘ to the 135^∘ direction and then again continuously rotate into the negative applied field direction.