Large improvement of coercivity in Sm-(Co,Cu)/Fe films by Cu addition.
The magnetic properties and microstructure of Sm-(Co,Cu)/Fe films were investigated systematically. The addition of Cu is helpful for keeping a better multilayer structure due to the reduction of the crystallization temperature of the hard phase. With lowering the temperature, the coercivity of the Sm-(Co,Cu)/Fe films increases rapidly with a linear relationship. The Cu addition significantly improves the coercivities of the Sm-(Co,Cu)/Fe multilayer films, especially at the low temperatures. Adding the Cu as well as lowering the temperature cause a large inhomogeneity in the hard phase, and therefore a high pinning coercivity.
Key Laboratory of Magnetic Materials and Devices, Chinese Academe of Science (CAS), Ningbo Institute of Material Technology and Engineering (CAS), Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo 315201, People's Republic of China.
Jian
J
Zhang
Fang
F
Wang
Yong
Y
Zhang
Ji-Zhong
JZ
Song
Yun
Y
Zhang
Bao-Gen
BG
Shen
Ji-Rong
JR
Sun