Domain structure and perpendicular magnetic anisotropy in CoFe/Pd multilayers using off-axis electron holography

Desai Zhang, Justin M. Shaw, David Smith, Martha McCartney

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Multilayers of Co<inf>90</inf>Fe<inf>10</inf>/Pd with different bilayer thicknesses, have been deposited by dc-magnetron sputtering on thermally oxidized Si wafers. Transmission electron microscopy showed that the highly textured crystalline films had columnar structure, while scanning transmission electron microscopy and atomic force microscopy respectively indicated some layer waviness and surface roughness. The magnetic domain structure and perpendicular magnetic anisotropy (PMA) of the Co<inf>90</inf>Fe<inf>10</inf>/Pd multilayers were investigated by off-axis electron holography and magnetic force microscopy. The Co<inf>90</inf>Fe<inf>10</inf> layer thickness was the primary factor determining the magnetic domain size and the perpendicular magnetization: both decreased as the thickness increased. The strongest PMA was observed in the sample with the thinnest magnetic layer of 0.45 nm.

Original languageEnglish (US)
Pages (from-to)16-21
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume388
DOIs
Publication statusPublished - Aug 15 2015

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Keywords

  • CoFe/Pd multilayers
  • Magnetic domain structure
  • Off-axis electron holography
  • Perpendicular magnetic anisotropy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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