Paper Title:
Preparation and Magnetic Properties Studies of Granular FePt Composite Films for High-Density Magnetic Recording
  Abstract

Granular (FePt)100-x–(NiO)x nanocomposite thin films with x in the range of 0 – 42 vol.% were fabricated on a natural-oxidized Si(100) substrate. It is found that both the coercivity and FePt domain size decrease with increasing NiO content for the (FePt)100-x–(NiO)x films. When the FePt-NiO nanocomposite film with NiO content of 10.4 vol.% is post-annealed at 750 °C with a high heating ramp rate of 100 °C/sec, the in-plane coercivity (Hc//) and perpendicular coercivity (Hc⊥) of the FePt films are 6.4 and 5.5 kOe, respectively. On the other hand, we used conductive atomic force microscope (CAFM) to confirm that the NiO compound is distributed at grain boundary of FePt grain that will constrain the domain size of FePt and obtain isolated magnetic domains. These results indicate that NiO addition is beneficial to enhance recoding density and reduce media noise of the FePt magnetic film.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
855-858
DOI
10.4028/www.scientific.net/AMR.79-82.855
Citation
S.C. Chen, T.H. Sun, T.Y. Kuo, P. C. Kuo, "Preparation and Magnetic Properties Studies of Granular FePt Composite Films for High-Density Magnetic Recording", Advanced Materials Research, Vols. 79-82, pp. 855-858, 2009
Online since
August 2009
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