Studies on Magnetization Reversal in 2-dimensional Spin Photonic Crystals of Cobalt Anti-dot Arrays

Abstract

Cobalt anti-dot square-lattice arrays of different periodicities were fabricated using the photolithography and wet-etching process The dimensions of these 2-dinnensional spin photonic crystals were checked by using scanning election nocioscopy and atomic force microscopy whet ens the magnetic properties were studied using the magneto-optical Kerr effect (MOKE) and magnetic force micioscopy (MFN4) The m-plane azimuthal MOKE meastnements showed uniaxial two-fold anisotropy \Vail the hiud and the easy axes along the nearest neighbor lows/columns and the diagonal making an angle of 45 with respect, to the neatest neighbor row/column; respectively The coercive field was strongly in by changes in the lattice periodicity The remanent state revealed well-defined domain stain:tin us: which varied penodically with the lattice geometry as was clearly seen from the MFM imaging To elucidate the domain configuration; we also performed nucromagnetic simulations and the results ale presented in tins report.