Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers

X. Li, K. W. Lin, W. C. Yeh, R. D. Desautels, J. van Lierop, Philip W.T. Pong

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


While the exchange bias in ferromagnetic/antiferromagnetic (FM/AF) bilayer and FM1/AF/FM2 trilayer configurations has been widely investigated, the role of an AF2 layer in FM/AF1/AF2 trilayer configurations is still not well understood. In this work, the magnetic properties of NiFe/CoO, NiFe/α-Fe2O3 bilayers, and NiFe/CoO/α-Fe2O3 trilayer were studied comparatively. The microstructure and chemical composition were characterized. Temperature dependent magnetometry reveals increased irreversibility temperature in NiFe/CoO/α-Fe2O3 trilayer compared with NiFe/CoO bilayer. The magnetic hysteresis loops show that the exchange bias (Hex) and coercivity (Hc) depend strongly on the anisotropy of AF layer (CoO, α-Fe2O3 and CoO/α-Fe2O3). Our work shows that the AF1/AF2 interfacial interactions can be used effectively for tuning the exchange bias in FM/AF1/AF2 trilayers.

Original languageEnglish (US)
Pages (from-to)524-528
Number of pages5
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number5
StatePublished - Feb 5 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


  • Exchange bias
  • Magnetic thin film
  • Nanomagnetics
  • Trilayer


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