Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1804375 | Journal of Magnetism and Magnetic Materials | 2007 | 4 Pages |
Abstract
Magnetization reversal processes and domain structures have been studied in Mo(1Â 1Â 0)/Co(0Â 0Â 0Â 1)/Au(1Â 1Â 1) structures grown by molecular beam epitaxy on monocrystalline (11-20) sapphire substrates. Wedge-shaped samples with different Co thickness gradients relative to the Mo [0Â 0Â 1] direction were fabricated. Observation of the domain structure was performed at room temperature using Kerr microscopy in a Co thickness range varying from 5 to 50Â nm, where the magnetization is oriented in the plane of the sample. A Co thickness-dependent coercivity field was determined through analysis of the domain wall position during the reversal process. A preferential orientation of magnetic domain walls was found, with the domains being needle-like. The orientation, as well as the size of the needles, depends on the Co thickness and the orientation of the magnetic field applied in the sample plane.
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Authors
M. Tekielak, R. Schäfer, J. McCord, A. Maziewski, V. Zablotskii, L.T. Baczewski, A. Wawro,