TY - JOUR
T1 - CoCrPtTa and Co/Pd perpendicular magnetic recording media with amorphous underlayers
AU - Onoue, T.
AU - Asahi, T.
AU - Kuramochi, K.
AU - Kawaji, J.
AU - Homma, T.
AU - Osaka, T.
N1 - Funding Information:
This work was supported by a grant-in-aid for the Future Project, “Advanced Research and Development on High Density Magnetic Recording Device by Means of Atomic Interface Design,” of the Japan Society for the Promotion of Science (JSPS-RFTF97R14401) and a grant from the Storage Research Consortium.
PY - 2001/7
Y1 - 2001/7
N2 - The effect of amorphous carbon underlayers on magnetic properties and read-write characteristics of Co73Cr18Pt8Ta3 single layer and Co/Pd multilayer perpendicular magnetic recording media were investigated. The increase in Hc and decrease in α, defined as 4π(dM/dH)H=Hc, were observed by increasing the underlayer thickness for both Co73Cr18Pt6Ta3 and Co/Pd media. The media with a low α value, suggesting a decrease in the exchange coupling, exhibited the higher coercivity and the improvement of S/N ratio. In read-write experiments, the improvement of S/N ratio for the Co/Pd media was achieved up to 400 kFRPI or even higher in the recording density by increasing carbon underlayer thickness, while that for the Co73Cr18Pt6Ta3 media was obtained up to ca. 250 kFRPI.
AB - The effect of amorphous carbon underlayers on magnetic properties and read-write characteristics of Co73Cr18Pt8Ta3 single layer and Co/Pd multilayer perpendicular magnetic recording media were investigated. The increase in Hc and decrease in α, defined as 4π(dM/dH)H=Hc, were observed by increasing the underlayer thickness for both Co73Cr18Pt6Ta3 and Co/Pd media. The media with a low α value, suggesting a decrease in the exchange coupling, exhibited the higher coercivity and the improvement of S/N ratio. In read-write experiments, the improvement of S/N ratio for the Co/Pd media was achieved up to 400 kFRPI or even higher in the recording density by increasing carbon underlayer thickness, while that for the Co73Cr18Pt6Ta3 media was obtained up to ca. 250 kFRPI.
KW - Amorphous underlayer
KW - Co/Pd multilayer media
KW - Exchange coupling
KW - Perpendicular magnetic recording
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U2 - 10.1109/20.950910
DO - 10.1109/20.950910
M3 - Conference article
AN - SCOPUS:0035386805
SN - 0018-9464
VL - 37
SP - 1592
EP - 1594
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 4 I
T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)
Y2 - 7 January 2001 through 11 January 2001
ER -