TY - JOUR
T1 - Microstructure and magnetic properties of granular CoPtCr-SiO2 films on Ru seed layer
AU - Xiao, Chun Tao
AU - Inaba, Yuki
AU - Shimatsu, Takehito
AU - Muraoka, Hiroaki
N1 - Funding Information:
This work was supported in part by the Natural Science Foundation of Gansu Province (No. ZS021-A25-023-C).
PY - 2007/3/10
Y1 - 2007/3/10
N2 - Granular-type [(Co90Cr10)85Pt 15]89.8-[SiO2]10.2 films were prepared by using co-sputtering methods, with Ru as a seed layer. Influences of Ru thickness on the microstructure and magnetic properties of the CoPtCr-SiO2 magnetic layer were investigated. It was found that the seed layer obviously effected the grain isolation, c-axis distribution and magnetic parameters. The Ru seed layer with a suitable thickness is very helpful for achievement of high anisotropy, proper coercivity and high squareness. The anisotropy energy of the magnetic layer can be as high as 5 × 10 6 erg/cm3 or more, even with a thin Ru layer, promising good thermal stability. It was noted that the Ru layer markedly enhanced the isolation of CoPtCr grains, corresponding to the increase of coercivity and the decrease of loop slope. Moreover, it was also revealed that the addition of SiO2 to CoPtCr effectively isolated the CoPtCr grains without disturbing the epitaxial growth of CoPtCr grains on the Ru seed layer.
AB - Granular-type [(Co90Cr10)85Pt 15]89.8-[SiO2]10.2 films were prepared by using co-sputtering methods, with Ru as a seed layer. Influences of Ru thickness on the microstructure and magnetic properties of the CoPtCr-SiO2 magnetic layer were investigated. It was found that the seed layer obviously effected the grain isolation, c-axis distribution and magnetic parameters. The Ru seed layer with a suitable thickness is very helpful for achievement of high anisotropy, proper coercivity and high squareness. The anisotropy energy of the magnetic layer can be as high as 5 × 10 6 erg/cm3 or more, even with a thin Ru layer, promising good thermal stability. It was noted that the Ru layer markedly enhanced the isolation of CoPtCr grains, corresponding to the increase of coercivity and the decrease of loop slope. Moreover, it was also revealed that the addition of SiO2 to CoPtCr effectively isolated the CoPtCr grains without disturbing the epitaxial growth of CoPtCr grains on the Ru seed layer.
KW - Magnetic properties
KW - Microstructure
KW - Perpendicular media
KW - Seed layer thickness
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U2 - 10.1142/S0217984907012736
DO - 10.1142/S0217984907012736
M3 - Article
AN - SCOPUS:33947672924
VL - 21
SP - 357
EP - 363
JO - Modern Physics Letters B
JF - Modern Physics Letters B
SN - 0217-9849
IS - 6
ER -