Epitaxial PtMn/NiFe exchange-biased bilayers containing directly deposited ordered PtMn

Young Suk Choi*, Amanda K. Petford-Long, Roger C C Ward

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

PtMnNiFe exchange-biased bilayers have been grown epitaxially on Si (001) using molecular-beam epitaxy. Spontaneous formation of the chemically ordered face-centered-tetragonal phase of PtMn layer was confirmed without postgrowth magnetic-field annealing, whose Ńel axis is perpendicular to the PtMnNiFe interface. The exchange anisotropy field stabilizes above a PtMn thickness of 15 nm which is much lower than that for polycrystalline PtMn-based exchange-biased systems. For comparison, PtMnNiFe exchange-biased bilayers have been prepared epitaxially on MgO (001) substrate. Spontaneous formation of the chemically ordered PtMn layer was also confirmed with Ńel axis parallel to the PtMnNiFe interface. The exchange anisotropy field of the bilayer on MgO stabilizes beyond a PtMn thickness of 15 nm as well.

Original languageEnglish (US)
Article number10C512
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
StatePublished - May 15 2005

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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