Published April 1, 2009 | Version v1
Journal article Metadata-only

Ultrahigh-Hc granular media with [CoB/Pt]n multilayer film sputtered under Ar+O2 atmosphere

Creators

  • 1. Storage Device Department, Central Research Laboratory, Hitachi, Ltd., 2880 Kozu, Odawara-shi, Kanagawa 256-8510 (Japan)
  • 2. Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita-shi, Osaka 565-0871 (Japan)

Description

We developed a [Co/Pt]n multilayer film for fabricating a perpendicular recording film with an ultrahigh coercivity (Hc). Adding boron into each Co layer and further introducing O2 during deposition yielded a high Hc of 1200 kA/m. Transmission electron microscopy and magnetic measurements suggested that the intergranular exchange coupling was reduced to the level of conventional CoCrPt-oxide granular films. The [CoB/Pt]n+O multilayer film is applicable to a hard magnetic layer in exchange-coupled composite media as well as energy-assisted magnetic recording media

Additional details

Identifiers

DOI
10.1063/1.3059608;

Publishing Information

Journal Title
Journal of Applied Physics
Journal Volume
105
Journal Issue
7
Journal Page Range
p. 07B705-07B705.3
ISSN
0021-8979
CODEN
JAPIAU

Conference

Title
53. annual conference on magnetism and magnetic materials
Dates
10-14 Nov 2008
Place
Austin, TX (United States)

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40062413
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANISOTROPY; ARGON; ATMOSPHERES; BORON ALLOYS; COBALT ALLOYS; COERCIVE FORCE; LAYERS; OXYGEN; PLATINUM; SPUTTERING; SURFACE COATING; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALLOYS; DEPOSITION; ELECTRON MICROSCOPY; ELEMENTS; FILMS; FLUIDS; GASES; METALS; MICROSCOPY; NONMETALS; PLATINUM METALS; RARE GASES; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Notes
(c) 2009 American Institute of Physics