TY - JOUR
T1 - Analysis of microstructures for Co/Pd multilayer perpendicular magnetic recording media with carbon underlayer
AU - Asahi, T.
AU - Kuramochi, K.
AU - Kawaji, J.
AU - Onoue, T.
AU - Osaka, T.
AU - Saigo, M.
N1 - Funding Information:
This work was financially supported by a grant-in-aid for the Future Project, “Ultra High-density Magnetic Recording” of the Japan Society for the Promotion of Science (JSPS-RFTF97R14401). The authors express their gratitude to Dr. Y. Okinaka, Waseda University, for his help in preparing the manuscript, and Mr. K. Yabe, OKI Engineering for his assistance in cross-sectional TEM experiments.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2001/10
Y1 - 2001/10
N2 - The effect of amorphous carbon underlayer thickness on the microstructure of the Co/Pd multilayer perpendicular magnetic recording media was investigated. From the magnetic force microscopy observation in the AC-demagnetized state of the Co/Pd multilayer media, the magnetic cluster size was observed to effectively decrease with an increase in carbon underlayer thickness, where the higher coercivity and the higher S/N ratio of the Co/Pd multilayer media were obtained with the thicker underlayer. Furthermore, the distribution of [1 1 1] orientation of FCC-Pd became broader, and the grain size decreased with an increase in the carbon underlayer thickness. These effects caused the magnetic exchange decoupling of Co/Pd multilayer media. We suggested that the change of microstructure was directly related to the surface roughness of the amorphous carbon underlayer.
AB - The effect of amorphous carbon underlayer thickness on the microstructure of the Co/Pd multilayer perpendicular magnetic recording media was investigated. From the magnetic force microscopy observation in the AC-demagnetized state of the Co/Pd multilayer media, the magnetic cluster size was observed to effectively decrease with an increase in carbon underlayer thickness, where the higher coercivity and the higher S/N ratio of the Co/Pd multilayer media were obtained with the thicker underlayer. Furthermore, the distribution of [1 1 1] orientation of FCC-Pd became broader, and the grain size decreased with an increase in the carbon underlayer thickness. These effects caused the magnetic exchange decoupling of Co/Pd multilayer media. We suggested that the change of microstructure was directly related to the surface roughness of the amorphous carbon underlayer.
KW - Amorpgous carbon underlayer
KW - Multilayers
KW - Perpendicular magnetic recording
UR - http://www.scopus.com/inward/record.url?scp=0035477386&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035477386&partnerID=8YFLogxK
U2 - 10.1016/S0304-8853(01)00305-5
DO - 10.1016/S0304-8853(01)00305-5
M3 - Conference article
AN - SCOPUS:0035477386
SN - 0304-8853
VL - 235
SP - 87
EP - 92
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1-3
T2 - Proceedings of the 5th Perpendicular Magnetic Recording Conference (PMRC 2000)
Y2 - 23 October 2000 through 26 October 2000
ER -