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MA: Fachverband Magnetismus

MA 8: Magnetic Coupling Phenomena / Exchange Bias

MA 8.12: Vortrag

Montag, 23. März 2009, 18:00–18:15, HSZ 401

Pinned and rotatable magnetic moments in the MnPd/Fe exchange bias system — •Sebastian Brück¹, Xiaosong Ji², Gisela Schütz¹, Kannan M. Krishnan², and Eberhard Goering¹ — ¹Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, D-70569 Stuttgart, Deutschland — ²Dept. of Materials Science and Engineering, University of Washington, Seattle, USA

The element-specific magnetic structure of an epitaxially grown Mn₅₂Pd₄₈/Fe exchange bias system at the antiferromagnet/ferromagnet interface has been investigated by soft X-ray magnetic circular dichroism and resonant magnetic reflectivity. The magnetic reflectivity measurements were carried out at the UE56/2-PGM1 beamline at BESSY II using our newly developed UHV reflectometer [1]. A complex magnetic interfacial configuration, consisting of a 2-monolayer thick induced ferromagnetic region, and pinned uncompensated Mn moments that reach far deeper, is found in the antiferromagnet [2]. Proof for the direct relationship between the pinned Mn moments and the exchange bias loop shift is found from comparison of measurements parallel and perpendicular to the field cooling direction.

S. Brück et al. Rev. Sci. Instrum. 79, 083109 (2008)
S. Brück et al. Phys. Rev. Lett. 101, 126402 (2008)