Origin of perpendicular magnetic anisotropy of SmCo5 thin films with Cu underlayer

Junichi Sayama, Kazuki Mizutani, Toru Asahi, Jun Ariake, Kazuhiro Ouchi, Tetsuya Osaka

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Effects of the Cu underlayer thickness and the addition of Cu to a Sm-Co layer on magnetic properties and microstructure of SmCo5 thin films exhibiting perpendicular magnetic anisotropy were studied. The origin of the perpendicular magnetic anisotropy was discussed from these experimental results. A thick Cu underlayer of more than 100 nm brought about high perpendicular magnetic anisotropy leading to the squareness ratio equal to unity. The Cu addition enhanced the perpendicular magnetic anisotropy and reduced the Cu underlayer thickness required to obtain the squareness ratio of unity. X-ray diffractometry showed that the crystalline orientation of the Sm-Co layer did not correlate with that of the Cu underlayer. Auger electron spectroscopy revealed that Cu atoms were diffused up to the Sm-Co layer from the Cu underlayer. From the results, Cu atoms existing in the Sm-Co layer were suggested to be strongly related with an appearance of the perpendicular magnetic anisotropy by introducing the Cu underlayer.

Original languageEnglish
Pages (from-to)271-278
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume301
Issue number1
DOIs
Publication statusPublished - 2006 Jun 1

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Keywords

  • Cu addition
  • Cu underlayer
  • Perpendicular magnetic anisotropy
  • Sm-Co-Cu intermetallic phase
  • SmCo thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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