Optical and structural properties of cobalt-permalloy slanted columnar heterostructure thin films

Derek Sekora, Chad Briley, Mathias Schubert, Eva Schubert

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1 Scopus citations

Abstract

Optical and structural properties of sequential Co-column–NiFe-column slanted columnar heterostructure thin films with an Al 2 O 3 passivation coating are reported. Electron-beam evaporated glancing angle deposition is utilized to deposit the sequential multiple-material slanted columnar heterostructure thin films. Mueller matrix generalized spectroscopic ellipsometry data is analyzed with a best-match model approach employing the anisotropic Bruggeman effective medium approximation formalism to determine bulk-like and anisotropic optical and structural properties of the individual Co and NiFe slanted columnar material sub-layers. Scanning electron microscopy is applied to image the Co-NiFe sequential growth properties and to verify the results of the ellipsometric analysis. Comparisons to single-material slanted columnar thin films and optically bulk solid thin films are presented and discussed. We find that the optical and structural properties of each material sub-layer of the sequential slanted columnar heterostructure film are distinct from each other and resemble those of their respective single-material counterparts.

Original languageEnglish (US)
Pages (from-to)783-787
Number of pages5
JournalApplied Surface Science
Volume421
DOIs
Publication statusPublished - Nov 1 2017

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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