Investigating magnetic proximity effects in NiO/Pd with polarized neutron reflectometry

A. Hoffmann, M. R. Fitzsimmons, J. A. Dura, C. F. Majkrzak

Research output: Contribution to journalArticlepeer-review

Abstract

With polarized neutron reflectometry we investigated NiO/Pd heterostructures for the presence of a magnetic proximity effect, which is expected to produce an induced ferromagnetic moment in Pd. Using a specific isotope mixture of Ni in the preparation of NiO, the chemical contrast across the Pd/NiO interface was greatly suppressed, thus enhancing sensitivity to magnetic contrast at the reflecting interface. Despite enhanced sensitivity, no evidence for a proximity effect was observed. If present, the magnetic moment per Pd atom could not be more than 0.01/μB, regardless of Pd layer thickness, crystalline interface orientation, and number of NiO/Pd bilayers.

Original languageEnglish (US)
Article number024428
Pages (from-to)244281-244287
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number2
DOIs
StatePublished - Jan 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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