Perpendicular magnetic anisotropy and magnetic domain structure were studied in epitaxial [Co(tCo)/Pt(10 Å )]30 ( and 10 Å) multilayers prepared on Al2O3(1 1 -2 0) substrate via Mo or Pt seed layer. The best perpendicular magnetic effect occurred for tCo∼3 Å. At remnant state the domain size tends to increase as tCo decreases, and the domain structure depends strongly on the seed layer. For [Co(3 Å )/Pt(10 Å)]30 multilayers grown on gold grid made hole arrays, the polar coercivity inside the holes is different from those on the gold land and unpatterned area.
Journal of Magnetism and Magnetic Materials, 209(1-3): 90-94