Co 36-40Fe 64-60 films were electrodeposited on Cu/Si substrates from electrolytes containing variable amounts of Fe 3+, to control the film's oxygen content. The films were body centered cubic with grain sizes of 10 to 20 nm. Analytical electron microscopy was used to determine oxygen distributions and bonding states in the films. Intergranular trivalent Fe 2O 3 was distributed along grain boundaries in the films with highest oxygen content. A lower volume fraction of intragranular FeO particles were observed in low oxygen content films. Intergranular Fe 3+ oxide increased the coercivity and magnetoresistance and reduced the mass saturation magnetization relative to the low oxygen content films.
ASJC Scopus subject areas
- General Physics and Astronomy