Oxygen incorporation into electrodeposited CoFe films

Consequences for structure and magnetic properties

S. Elhalawaty, Ray Carpenter, J. George, S. R. Brankovic

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The nanostructure and magnetic properties of electrodeposited Co 40Fe60 alloy films containing varying amounts of oxygen were investigated using transmission electron microscopy (TEM) and diffraction, secondary ion mass spectroscopy (SIMS), and superconducting quantum interference device (SQUID) measurements. Oxygen content in the CoFe deposit was controlled by electrolyte composition. Films were deposited on Si {100} substrates with thin CuTi seed layer. Electron energy loss and x-ray spectroscopies showed that the low oxygen films contained intragranular FeO particles and that the high oxygen films contained Fe2O3 along grain boundaries. The films with oxide present at the grain boundary had increased coercivity and reduced saturation magnetization relative to the lower oxygen content films with intragranular oxide. The differences in magnetic properties between low oxygen and high oxygen concentration films were attributed to stronger mobile domain wall interactions with the grain boundary oxide layers relative to interactions with the intragranular oxide particles in the low oxygen specimens.

Original languageEnglish (US)
JournalJournal of the Electrochemical Society
Volume158
Issue number11
DOIs
StatePublished - 2011

Fingerprint

Magnetic properties
Oxygen
magnetic properties
oxygen
Oxides
Grain boundaries
oxides
grain boundaries
Spectroscopy
SQUIDs
Domain walls
Saturation magnetization
Coercive force
Electron diffraction
x ray spectroscopy
Electrolytes
coercivity
domain wall
Seed
seeds

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Oxygen incorporation into electrodeposited CoFe films : Consequences for structure and magnetic properties. / Elhalawaty, S.; Carpenter, Ray; George, J.; Brankovic, S. R.

In: Journal of the Electrochemical Society, Vol. 158, No. 11, 2011.

Research output: Contribution to journalArticle

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