Influence of a Non-Magnetic Underlayer on the Magnetic Anisotropy of Ultra-Thin Co Sandwiches

Brad N. Engel, Christian Marlière, Charles M. Falco, Christian Marlière

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We have used in situ polar Kerr effect measurements to study the magnetic anisotropy of MBE-grown Cu/Au/Co/Au sandwich structures. We reported earlier that the magnitude of the Au/Co/Au perpendicular anisotropy is strongly peaked at ∼1 atomic layer Au overlayer coverage. We report here extensions of this work to investigate the influence on anisotropy of a confined ultra-thin non-magnetic underlayer placed at one of the Co interfaces. Sandwich structures were deposited in a stepped-wedge geometry providing multiple underlayer thicknesses for each sample. For the case of an underlayer wedge of Au, e.g. Cu/Au(x)/Co/Au, we find a sharp minimum in the perpendicular anisotropy at ∼1 atomic layer of Au. This anisotropy behavior is opposite to that of a Au overlayer deposited on a Co film.

Original languageEnglish (US)
Pages (from-to)4080-4084
Number of pages5
JournalIEEE Transactions on Magnetics
Issue number6
StatePublished - Nov 1995

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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