Laminated amorphous FeSiBC films with various spacer layers, including Cu, Co0.45Cu0.55, Co0.8Cu0.2, and CoFe, were prepared in order to study the effect of interface structure and magnetic exchange interaction on the magnetic softness and uniaxial anisotropy of multilayered film. It is found that laminating FeSiBC film with thin nonmagnetic or weak magnetic spacers yields much lower coercivity and higher remanent magnetization than those with magnetic spacers. Optimal films with the desired properties of Hc ∼ 1.5 Oe, Mr/Ms = 95%, and Hk ∼ 16 Oe were obtained. Therefore, it is confirmed that the exchange interaction constant of spacer layer plays a more important role than that of interface structure. Furthermore, laminating FeSiBC with nonmagnetic layers only slightly changes magnetostrictive coefficient.
Received 02 November 2012Accepted 12 December 2012Published online 08 March 2013
The authors would like to acknowledge financial support from the National Basic Research Program of China under Grant No. 2012CB933104, the Foundation for Innovative Research Groups of the National Natural Science Fund of China under Grant No. 61021061, the National Science Fund of China under Grant No. 61271031, the Fundamental Research Funds for the Central Universities, and the Guangdong Innovative Research Team Program under Grant No. 201001D0104713329.
Article outline: I. INTRODUCTION II. EXPERIMENTAL III. RESULTS AND DISCUSSION IV. CONCLUSIONS