Enhanced exchange bias due to an ultra-thin, non-magnetic insulator spacer layer

A. Paul*, D. E. Bürgler, M. Luysberg, P. Grünberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The exchange bias effect of Co/CoO bilayers is found to significantly increase when an ultra-thin, non-magnetic insulating AlOx spacer is added at the ferromagnet/antiferromagnet interface. The dependence on the spacer thickness is non-monotonic with a maximum two-fold enhancement of the exchange bias field HEB at a spacer thickness of 1.0 nm. These observations are explained in terms of a discontinuous layer structure of the spacer and its thickness evolution. There is no indication of a magnetic interaction across the AlOx spacer layer.

Original languageEnglish
Pages (from-to)233-239
Number of pages7
JournalEurophysics Letters
Volume68
Issue number2
DOIs
StatePublished - Oct 2004
Externally publishedYes

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