Behavior of micromagnetic particles in an opposed-poles orientation magnetic field

Uniform microparticles with a dimension of about 1 μm in diameter and several microns in length, were obtained by an electroless deposition technique of CoNiP on bacilli initiated by molecular palladium catalysts. Water-based magnetic fluid containing the small particles was treated with magnetic fields in order to obtain regular arrays of aligned particles. Using an optical microscope with camera system, real time visualization of the magnetic particles was carried out. Both array and chain-like cluster formation of particles under magnetic field were observed. The interaction with the magnetic fields was also analyzed.