Probing misalignment in exchange biased systems: A dynamic approach

Le Graët, C.; Spenato, D.; Pogossian, S. P.; Dekadjevi, D. T.; Ben Youssef, J.
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p262502
Academic Journal
An experimental method based on ferromagnetic resonance is proposed to quantify the misalignment between ferromagnetic and antiferromagnetic easy axis in exchange biased systems. Our experimental study deals with Ni81Fe19/Al2O3 and exchange biased Ni81Fe19/NiO bilayers. Performing ferromagnetic resonance studies, we demonstrate that the misalignment is present in the exchange biased system. It is revealed by an asymmetry of the resonance field angular dependence. Using a simple model, the angle of misalignment is determined.


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