Paper Title:
Magnetic Properties of TbCo/(SiNx/Co)n Films
  Abstract

The Tb32Co68/(SiNx/Co)n films (n = 0~3) were prepared by magnetron sputtering. The magnetic anisotropy of all Tb32Co68/(SiNx/Co)n films are perpendicular to the film plane. It is found that the saturation magnetization (Ms) and perpendicular coercivity (Hc⊥ ) of the Tb32Co68/(SiNx/Co)3 film are 263 emu/cm3 and 3592 Oe, respectively. This film appears to be a promising material as a heat-assisted magnetic recording (HAMR) medium. The cross-sectional high resolution transmission electron microscope (HRTEM) images show that the interface roughness between the (SiNx/Co)n layers and TbCo layer increases as n is increased. The rough surface provides more obstacles and pinning sites that hinder the motion of the domain walls at interface between the (SiNx/Co)n layers and TbCo layer. Therefore, the Hc values are profoundly influenced by the interface roughness.

  Info
Periodical
Advanced Materials Research (Volumes 47-50)
Edited by
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
Pages
785-788
DOI
10.4028/www.scientific.net/AMR.47-50.785
Citation
G.P. Lin, P. C. Kuo, P.L. Lin, Y.H. Fang, K.T. Huang, "Magnetic Properties of TbCo/(SiNx/Co)n Films", Advanced Materials Research, Vols. 47-50, pp. 785-788, 2008
Online since
June 2008
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$32.00
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