TY - JOUR
T1 - Origin of perpendicular magnetic anisotropy of SmCo5 thin films with Cu underlayer
AU - Sayama, Junichi
AU - Mizutani, Kazuki
AU - Asahi, Toru
AU - Ariake, Jun
AU - Ouchi, Kazuhiro
AU - Osaka, Tetsuya
N1 - Funding Information:
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 partly supported by the Grant-in-Aid for COE Research “Establishment of Molecular Nano-Engineering by Utilizing Nanostructure Arrays and its Development into Micro-System” and the Special Coordination Funds for Promoting Science and Technology “Creation of Novel Magnetic Recording Materials Using Nano-Interface Technology” and “Establishment of Consolidated Research Institute for Advanced Science and Medical Care” from MEXT.
PY - 2006/6
Y1 - 2006/6
N2 - Effects of the Cu underlayer thickness and the addition of Cu to a Sm-Co layer on magnetic properties and microstructure of SmCo5 thin films exhibiting perpendicular magnetic anisotropy were studied. The origin of the perpendicular magnetic anisotropy was discussed from these experimental results. A thick Cu underlayer of more than 100 nm brought about high perpendicular magnetic anisotropy leading to the squareness ratio equal to unity. The Cu addition enhanced the perpendicular magnetic anisotropy and reduced the Cu underlayer thickness required to obtain the squareness ratio of unity. X-ray diffractometry showed that the crystalline orientation of the Sm-Co layer did not correlate with that of the Cu underlayer. Auger electron spectroscopy revealed that Cu atoms were diffused up to the Sm-Co layer from the Cu underlayer. From the results, Cu atoms existing in the Sm-Co layer were suggested to be strongly related with an appearance of the perpendicular magnetic anisotropy by introducing the Cu underlayer.
AB - Effects of the Cu underlayer thickness and the addition of Cu to a Sm-Co layer on magnetic properties and microstructure of SmCo5 thin films exhibiting perpendicular magnetic anisotropy were studied. The origin of the perpendicular magnetic anisotropy was discussed from these experimental results. A thick Cu underlayer of more than 100 nm brought about high perpendicular magnetic anisotropy leading to the squareness ratio equal to unity. The Cu addition enhanced the perpendicular magnetic anisotropy and reduced the Cu underlayer thickness required to obtain the squareness ratio of unity. X-ray diffractometry showed that the crystalline orientation of the Sm-Co layer did not correlate with that of the Cu underlayer. Auger electron spectroscopy revealed that Cu atoms were diffused up to the Sm-Co layer from the Cu underlayer. From the results, Cu atoms existing in the Sm-Co layer were suggested to be strongly related with an appearance of the perpendicular magnetic anisotropy by introducing the Cu underlayer.
KW - Cu addition
KW - Cu underlayer
KW - Perpendicular magnetic anisotropy
KW - Sm-Co-Cu intermetallic phase
KW - SmCo thin film
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U2 - 10.1016/j.jmmm.2005.07.002
DO - 10.1016/j.jmmm.2005.07.002
M3 - Article
AN - SCOPUS:33644975005
SN - 0304-8853
VL - 301
SP - 271
EP - 278
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1
ER -