Preparation and magnetic properties studies of granular FePt composite films for high-density magnetic recording
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 ℃ with a high heating ramp rate of 100 ℃/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.
Magnetron co-sputtering FePt-NiO nanocomposite films Magnetic propertie
S. C. Chen T. H. Sun T. Y. Kuo P. C. Kuo
Department of Materials Engineering, Ming Chi University of Technology, Taipei 243, Taiwan Institute of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan
国际会议
青岛
英文
855-858
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）