TY - JOUR
T1 - SmCO5-based thin films with high magnetic anisotropy for perpendicular magnetic recording
AU - Sayama, Junichi
AU - Mizutani, Kazuki
AU - Yamashita, Yuki
AU - Asahi, Toru
AU - Osaka, Tetsuya
N1 - Funding Information:
The authors express their gratitude to Mr. J. Ariake and Dr. K. Ouchi, Akita Research Institute of Advanced Technology (AIT), for their helpful discussion. They would also like to thank Dr. Y. Okinaka, Waseda University, for his useful comments. This work was carried out at the Center for Practical Nano-Chemistry for the 21C-COE Programme of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. It was also supported in part by a Grant-in-Aid for COE Research and the MEXT Special Coordination Funds for Promoting Science and Technology.
PY - 2005/10
Y1 - 2005/10
N2 - An investigation was carried out on the effects of the addition of Cu and the thickness of the SmCo5 -based thin film with perpendicular magnetic anisotropy upon its magnetic properties, with the aim of reducing the Cu/Ti underlayer thickness. As a result, the Cu/Ti under-layer thickness necessary to obtain the squareness ratio of unity was successfully reduced from 125 to 50 nm. Moreover, for the SmCo5 double-layered perpendicular magnetic recording media with a CoZrNb soft magnetic underlayer, the Cu/Ti underlayer thickness was further reduced to 35 nm. However, the magnetic cluster size and the values of coercivity and saturation field of the SmCo5 media were found to be too large. Thus, we recognized the need for adjusting the cluster size and the magnetic properties to appropriate values, and also the need for investigating the possibility of using this material as patterned media or thermally assisted recording media.
AB - An investigation was carried out on the effects of the addition of Cu and the thickness of the SmCo5 -based thin film with perpendicular magnetic anisotropy upon its magnetic properties, with the aim of reducing the Cu/Ti underlayer thickness. As a result, the Cu/Ti under-layer thickness necessary to obtain the squareness ratio of unity was successfully reduced from 125 to 50 nm. Moreover, for the SmCo5 double-layered perpendicular magnetic recording media with a CoZrNb soft magnetic underlayer, the Cu/Ti underlayer thickness was further reduced to 35 nm. However, the magnetic cluster size and the values of coercivity and saturation field of the SmCo5 media were found to be too large. Thus, we recognized the need for adjusting the cluster size and the magnetic properties to appropriate values, and also the need for investigating the possibility of using this material as patterned media or thermally assisted recording media.
KW - Cu addition
KW - Cu/Ti underlayer
KW - Perpendicular magnetic anisotropy
KW - Perpendicular magnetic recording medium
KW - SmCo thin film
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U2 - 10.1109/TMAG.2005.854849
DO - 10.1109/TMAG.2005.854849
M3 - Article
AN - SCOPUS:27744561310
VL - 41
SP - 3133
EP - 3135
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 10
ER -