Abstract
In this article we present a detailed investigation of the structural and magnetic properties of exchange biased NiFe (ferromagnet)/FeMn (antiferromagnet) thin films. The influence of the shape anisotropy on exchange bias and the magnetization reversal mechanism in a sample with patterned lines is compared with a continuous two-dimensional reference sample. Polarized neutron reflectivity (PNR) is employed to study the magnetization reversal by analyzing the spin-flip and non-spin-flip reflectivities. PNR measurements show that the magnetization reversal in the reference two-dimensional film and patterned lines is by domain wall motion rather than coherent rotation of magnetization.
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Acknowledgements
We thank Mr. B. Opperdoes for his help in MBE growth. This work has been supported by the FWO and GOA/09/006 research programs. We acknowledge an STFC grant for access to the ISIS experimental facility.
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Mohanty, J., Vandezande, S., Brems, S. et al. Magnetization reversal studies of continuous and patterned exchange biased NiFe/FeMn thin films. Appl. Phys. A 109, 181–187 (2012). https://doi.org/10.1007/s00339-012-7031-2
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DOI: https://doi.org/10.1007/s00339-012-7031-2