title: Optical property study of FePt-C nanocomposite thin film for heat-assisted magnetic recording.
abstract: Optical properties of the FePt-C nanocomposite thin film that was synthesized by sputtering with MgO/NiTa underlayer on glass substrate have been determined by an approach combining spectroscopic ellipsometry and transmission over the wavelength range of 380 - 1700 nm. It was observed that the refractive index is larger than the extinction coefficient, indicating that free electron absorption is not the dominant optical transition in the FePt-C thin film. Compared with FePt thin film, the FePt-C thin film has smaller optical constants, which lead to better optical performance including smaller optical spot on recording media and higher transducer efficiency for heat assisted magnetic recording.
authors.affiliation: Data Storage Institute, Agency for Science, Technology and Research (A-STAR), 117608 Singapore. cen_zhanhong@dsi.a-star.edu.sg
authors.forename: Z H
authors.initials: ZH
authors.lastname: Cen
authors.forename: B X
authors.initials: BX
authors.lastname: Xu
authors.forename: J F
authors.initials: JF
authors.lastname: Hu
authors.forename: J M
authors.initials: JM
authors.lastname: Li
authors.forename: K M
authors.initials: KM
authors.lastname: Cher
authors.forename: Y T
authors.initials: YT
authors.lastname: Toh
authors.forename: K D
authors.initials: KD
authors.lastname: Ye
authors.forename: J
authors.initials: J
authors.lastname: Zhang
mesh_terms: D002244:Carbon / Q000737:chemistry* / Q000528:radiation effects; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006358:Hot Temperature; D016247:Information Storage and Retrieval / Q000379:methods*; D007501:Iron / Q000737:chemistry* / Q000528:radiation effects; D060526:Magnetic Fields; D008567:Membranes, Artificial; D055096:Optical Devices; D010984:Platinum / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D008567:Membranes, Artificial; D010984:Platinum; D002244:Carbon; D007501:Iron