Synthesis and magnetic properties of electrodeposited metal particles on anodic alumite film

Elongated metal particles have been prepared by depositing transition metals into the pore channels of anodic aluminum oxide (alumite), with well-defind pores that build up into uniform and parallel channels. The highest coercivity for freshly prepared alpha-Fe particles in the alumite substrate reached 2700 Oe in the easy direction. The remanance curves of alumite films containing electrodeposited metals (Fe and Co) were measured to study the magnetostatic interaction of the particles. The possible reversal mechanisms of the metal particles in the alumite substrates were examined by the rotational hysteresis integral and the angular variation of the coercivity. (C) 1996 American Institute of Physics.