Characteristic magnetic domain size in Fe with exchange-coupled antiferromagnetic NiO underlayer

Hiroto Sakimura, Masahiko Suzuki, Yasushi Yamauchi, Ying Gao, Takashi Harumoto, Yoshio Nakamura, Kazuya Ando, Ji Shi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Characteristic size of magnetic domains in Fe films deposited on NiO layers was measured by spin-polarized low-energy electron microscopy. Our observation results and statistical analysis revealed the increase of magnetic domain sizes with the Fe-thickness increase. Interestingly, the evolution of magnetic domain sizes in Fe showed a strong dependence on the thickness of NiO underneath, or thicker NiO lead the formation of smaller magnetic domains in Fe. This phenomenon can be explained by the increase of the interlayer exchange coupling between Fe and the polycrystalline NiO. It is consistent with the results of recent studies that spin dynamics at a ferromagnet/antiferromagnet interface is affected by the domain structure. Our results suggest a new route to manipulate the micromagnetic structure without the application of external magnetic field.

Original languageEnglish
Article number146515
JournalApplied Surface Science
Volume526
DOIs
Publication statusPublished - 2020 Oct 1

Keywords

  • Antiferromagnetism
  • Interlayer exchange coupling
  • Magnetic domain
  • Spin-polarized low-energy electron microscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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