TY - JOUR
T1 - Magnetic anisotropy of L11-type (Co1-XM X)50Pt50 (M:Ni, Fe, Cr, Mn) and Co 50(Pt1-XPdX)50 ordered alloy perpendicular films
AU - Kataoka, H.
AU - Sato, H.
AU - Shimatsu, T.
AU - Okamoto, S.
AU - Kitakami, O.
AU - Aoi, H.
PY - 2010
Y1 - 2010
N2 - We substituted 3d transition elements M (M=Ni, Fe, Cr, and Mn) for some of the Co, or Pd for some of the Pt, in L11-type Co50Pt 50 ordered alloy perpendicular films, and studied magnetic and structural properties. Films were fabricated at a substrate temperature of 360oC using ultra-high vacuum (UHV) sputter film deposition. The order parameter S was almost a constant of about 0.5 when Ni was substituted for some of the Co. The uniaxial magnetic anisotropy Ku and the saturation magnetization, Ms, decreased as the Ni content increased, however, Ku maintained a relatively large value of 1.8x107 erg/cm3 (Ms=570 emu/cm3) even for a Co 20Ni30Pt50 composition. In the substitutions of Fe for some of the Co, or Pd for some of the Pt, no significant variation in Ms was observed, however, the rate of decrease of Ku on increasing the Fe or Pd content was larger than when Ni was substituted. The substitution of Cr or Mn for some Co resulted in significant reductions in S, Ms and Ku. Experimental results showed the potential of Co-Ni-Pt ordered films for use in data storage applications, due to their very high Ku potential, relatively low Ms, the relatively low fabrication temperature, and good controllability of the grain orientation.
AB - We substituted 3d transition elements M (M=Ni, Fe, Cr, and Mn) for some of the Co, or Pd for some of the Pt, in L11-type Co50Pt 50 ordered alloy perpendicular films, and studied magnetic and structural properties. Films were fabricated at a substrate temperature of 360oC using ultra-high vacuum (UHV) sputter film deposition. The order parameter S was almost a constant of about 0.5 when Ni was substituted for some of the Co. The uniaxial magnetic anisotropy Ku and the saturation magnetization, Ms, decreased as the Ni content increased, however, Ku maintained a relatively large value of 1.8x107 erg/cm3 (Ms=570 emu/cm3) even for a Co 20Ni30Pt50 composition. In the substitutions of Fe for some of the Co, or Pd for some of the Pt, no significant variation in Ms was observed, however, the rate of decrease of Ku on increasing the Fe or Pd content was larger than when Ni was substituted. The substitution of Cr or Mn for some Co resulted in significant reductions in S, Ms and Ku. Experimental results showed the potential of Co-Ni-Pt ordered films for use in data storage applications, due to their very high Ku potential, relatively low Ms, the relatively low fabrication temperature, and good controllability of the grain orientation.
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U2 - 10.1088/1742-6596/200/10/102002
DO - 10.1088/1742-6596/200/10/102002
M3 - Conference article
AN - SCOPUS:77957074810
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 10
M1 - 102002
ER -