Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


J. Korean Phy. Soc. 2010; 56(4(2)): 1345-1349

Published online April 15, 2010

Copyright © The Korean Physical Society.

Studies on the magnetization reversal in 2-dimensional spin photonic crystals of cobalt anti-dot arrays

YoungPak Lee, N. G. Deshpande, W. C. Nam, M. S. Seo, X. R. Jin, S. J. Lee, J. Y. Rhee


Cobalt antidot square-lattice arrays of different periodicities were fabricated using the CMOS process. The dimensions of these anti-dot 2-dimensional spin photonic crystals were checked by scanning electron microscopy and atomic force microscopy, whereas the magnetic properties were studied using magneto-optical Kerr effect (MOKE) and magnetic force microscopy (MFM). The in-plane azimuthal MOKE measurements showed uniaxial two-fold anisotropy with the hard and the easy axis along the nearest neighbor rows/columns and the diagonal making an angle of 450, respectively. The coercive field is also strongly influenced by the change in the lattice periodicity. The remanent state revealed well-defined domain structures, which are periodic in nature with the lattice geometry as is clearly seen from the MFM imaging. To elucidate the domain configuration the micromagnetic simulations were also performed and presented.

Keywords: Spin photonic crystals, Magneto-optical Kerr effects, Magnetic anisotropy, Magnetic force microscopy, Magnetic reversals