PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME
A perpendicular magnetic recording medium and a method of manufacturing the same are provided. The perpendicular magnetic recording medium includes a substrate, and a recording layer comprising a plurality of independent first magnetic body regions and a plurality of second magnetic body regions formed on the substrate, the second magnetic body regions separating the first magnetic body regions from each other, and being formed by implanting dopant into a region in which the first magnetic body regions are to be separated. Each of the first magnetic body regions has an L1 0 structure and the dopant has an ionic or molecular shape.
1 . A perpendicular magnetic recording medium comprising:
a substrate; and
a recording layer comprising a plurality of independent first magnetic body regions and a plurality of second magnetic body regions formed on the substrate, the second magnetic body regions separating the first magnetic body regions from each other, and being formed by implanting a dopant into a region in which the first magnetic body regions are to be separated.
2 . The medium of claim 1 , wherein each of the first magnetic body regions has an L1 0 structure.
3 . The medium of claim 1 , wherein the recording layer is formed of CoPt alloy or FePt alloy.
4 . The medium of claim 1 , wherein the size of each of the first magnetic body regions is 4-10 nm.
5 . The medium of claim 1 , wherein a magnetic anisotropic energy of each of the first magnetic body regions is 10 5 erg/cc to 10 8 erg/cc.
6 . The medium of claim 1 , wherein the dopant has an ionic or molecular shape.
7 . The medium of claim 1 , wherein a magnetic anisotropic energy of each of the second magnetic body regions is less than 10 4 erg/cc.
8 . The medium of claim 1 , wherein each of the second magnetic body regions has an amorphous structure.
9 . The medium of claim 1 , wherein at least one of a soft magnetic underlayer, a buffer layer and an intermediate layer is formed between the substrate and the recording layer.
10 . A method of manufacturing a perpendicular magnetic recording medium, the method comprising:
forming a recording layer, having the shape of a continuous layer, on a substrate;
forming a mask on the recording layer; and
forming a plurality of independent first magnetic body regions and a plurality of second magnetic body regions, separating the first magnetic body regions from each other, within the recording layer, by implanting a dopant into the recording layer through the mask.
11 . The method of claim 10 , wherein the recording layer having a continuous layer is formed in an L1 0 structure.
12 . The method of claim 10 , wherein the recording layer is formed of CoPt alloy or FePt alloy.
13 . The method of claim 10 , wherein the forming of the mask is performed using a nanoparticle mask method.
14 . The method of claim 13 , wherein the pattern size of the mask is 4-10 nm.
15 . The method of claim 10 , wherein the dopant has an ionic or molecular shape.
16 . The method of claim 15 , wherein the ion is an He ion or Ga ion and the molecule is BnHm (where n and m are integers, n>10, 0≦m≦22) having a predetermined volume.
17 . The method of claim 10 , wherein a magnetic anisotropic energy of each of the second magnetic body regions is less than 10 4 erg/cc.