Interlayer exchange coupling in Pt/Co/Ru and Pt/Co/Ir superlattices

Sabit Karayev, Peyton D. Murray, Durga Khadka, T. R. Thapaliya, Kai Liu, S. X. Huang

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Magnetic multilayer thin films with perpendicular magnetic anisotropy (PMA) and interfacial Dzyaloshinskii-Moriya interaction (iDMI) are of intense interest for realizing magnetic skyrmions and modifying topological spin textures. We systematically investigate interlayer exchange coupling (IEC) in Pt/Co/Ru(Ir) superlattices that have PMA and large iDMI. The IEC is greatly tunable by varying Ru(Ir) or Pt thickness and the antiferromagnetic IEC is as large as 1.3mJ/m2 that is on the same order of magnitude as the iDMI. We find unusual magnetic hysteresis loop crossing between field-ascending and -descending magnetization curves. Furthermore, we identify magnetic phase diagrams for antiferromagnetic IEC and hysteresis loop crossing with respect to Ru(Ir) and Pt thickness. Our experimental findings may open a way in the development of synthetic antiferromagnetic spintronics and/or the realization of antiferromagnetic skyrmions.

Original languageEnglish (US)
Article number041401
JournalPhysical Review Materials
Volume3
Issue number4
DOIs
StatePublished - Apr 8 2019

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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