In order to develop a magnetic material for high-density magnetic recording media which overcomes the thermal agitation effect, the magnetic properties, such as saturation magnetization and magnetic anisotropy, were evaluated for Co-M (M = Pt, Pd, Ru, Rh, Os, Cr, Ge, Mo, Mn, Re, and Si) binary alloys. Ge addition was found to be effective in maintaining the value of the magnetic anisotropy field of Co. Furthermore, a ternary magnetic alloy of Co-Ge-Cr (85 at. % Co, 10 at. % Ge, 5 at. % Cr) was found to have the following magnetic properties: Kgrainu ≥ 3 × 106 erg/cm3, Hgraink ≈ 10kOe, and 4 π M s/Hgraink < 1.0. This magnetic material is a very promising candidate for use in high-density magnetic recording media.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)