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Magnetization configurations and hysteresis loops of small permalloy ellipses

Schneider, M ; Liszowski, J ; Rahm, M ; Wegscheider, Werner ; Weiss, Dieter ; Hoffmann, Horst ; Zweck, Josef



Abstract

We investigated systematically the easy axis magnetization reversal of 20 nm thick permalloy ellipses with a fixed major axis of 1.47 µm and minor axes of 0.22�1.47 µm. Lorentz transmission electron microscopy was used to image the micromagnetic configurations during magnetization reversal. Hysteresis loops of single ellipses were recorded by means of micro- Hall magnetometry and could be ...

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