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Magnetization reversal and magnetic anisotropy in Co network nanostructures

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9 Author(s)
W. Y. Lee ; Cavendish Lab., Cambridge Univ., UK ; H. T. Leung ; W. Zhang ; Y. B. Xu
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The magnetization reversal and magnetic anisotropy in Co network structures have been studied using magneto-optic Kerr effect (MOKE). An enhancement of the coercivity is observed in the network structures and is attributed to the pinning of domain walls by the hole edges in the vicinity of which the demagnetizing field spatially varies. We find that the magnetization reversal process is dominated by the intrinsic uniaxial anisotropy (2Ku/Ms≈200 Oe) in spite of the shape anisotropy induced by the hole edges. The influence of the cross-junction on the competition between the intrinsic uniaxial anisotropy and the induced shape anisotropy is discussed using micromagnetic simulations

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IEEE Transactions on Magnetics  (Volume:35 ,  Issue: 5 )