Compositional depth profile analysis of coatings on hard disks by X-ray photoelectron spectroscopy and imaging

Jianxia Gao, Erjia Liu, David Lee Butler, Aiping Zeng

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A hard disk medium is typically composed of several layers including the magnetic recording layer, a buffer layer, as well as a wear protective layer. In the work presented here, the hard disks analysed have a total of five layers with the uppermost layer being the lubricant. The second layer is diamond like coating and this is followed by the magnetic layer consisting of an alloy of cobalt and other elements. The fourth layer is a buffer composed of an alloy of chromium, vanadium and molybdenum with the final layer being a nickel transition layer doped with phosphorus. These multilayers were subjected to numerous etchings by argon ions. The chemical structures of these layers were analysed with an X-ray photoelectron spectroscope (XPS) after each etching. Combining the XPS spectra with XPS imaging it is possible to determine the depth distribution of elements in the hard disk coating. In addition, it is also shown that XPS imaging can be employed to monitor the thickness of all multilayers.

LanguageEnglish
Pages93-102
Number of pages10
JournalSurface and Coatings Technology
Volume176
Issue number1
DOIs
Publication statusPublished - 31 Dec 2003
Externally publishedYes

Fingerprint

Hard disk storage
Photoelectrons
X ray photoelectron spectroscopy
photoelectron spectroscopy
Imaging techniques
coatings
X rays
Coatings
profiles
Etching
Multilayers
x rays
Chromium Alloys
Vanadium
Diamond
Molybdenum
photoelectrons
Magnetic recording
Argon
Buffer layers

Keywords

  • hard disk
  • image
  • multilayers
  • X-ray photoelectron spectroscopy

Cite this

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Compositional depth profile analysis of coatings on hard disks by X-ray photoelectron spectroscopy and imaging. / Gao, Jianxia; Liu, Erjia; Butler, David Lee; Zeng, Aiping.

In: Surface and Coatings Technology, Vol. 176, No. 1, 31.12.2003, p. 93-102.

Research output: Contribution to journalArticle

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