Direct observations of ferromagnetic and antiferromagnetic domains in Pt/Co/Cr2O3/Pt perpendicular exchange biased film

Yu Shiratsuchi, Yoshinori Kotani, Saori Yoshida, Yasunori Yoshikawa, Kentaro Toyoki, Atsushi Kobane, Ryoichi Nakatani, Tetsuya Nakamura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

By using focused soft X-rays, magnetic domain imaging based on X-ray magnetic circular dichroism (XMCD) measurements was performed on a Pt/Co/Cr2O3/Pt film that exhibits both perpendicular magnetic anisotropy and perpendicular exchange anisotropy. In the AC-demagnetized state, spatial distributions of the XMCD corresponding to the magnetic domains were clearly observed. In particular, ferromagnetic and antiferromagnetic magnetic domains were separately observed by tuning the photon energy to either the ferromagnetic Co L3 edge or the antiferromagnetic Cr L3 edge. The ferromagnetic domain pattern is similar to the ones previously reported for Co/Pt multilayers, and the ferromagnetic and antiferromagnetic domains are spatially coupled. The magnetization curve measured after cooling the sample, while maintaining the demagnetized state, exhibited positive and negative exchange biases simultaneously, which suggests that the exchange bias is determined on a domain-by-domain basis.

Original languageEnglish
Pages (from-to)484-496
Number of pages13
JournalAIMS Materials Science
Volume2
Issue number4
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • Antiferromagnet
  • Exchange bias
  • Focused soft X-ray
  • Fresnel zone plate
  • Magnetic domain
  • Microspectroscopy
  • Soft X-ray absorption
  • Soft X-ray magnetic circular dichroism

ASJC Scopus subject areas

  • Materials Science(all)

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