Influence of field-annealing on the microstructure, magnetic and microwave properties of electrodeposited Co0.3Fe0.7 films

Abstract

Microstructure, magnetic properties and microwave characteristics of Co0.3Fe0.7 films fabricated by electro-deposition technique were investigated with post deposition field-annealing from 100 to 400 °C. The crystallinity and grain size of film was enhanced with annealing temperature increment. The lattice spacing of crystallographic planes has decreased with increase in field-annealing temperature. This has induced compressive stress in field-annealed films. Coercivity and saturation magnetization values were increased with enhanced crystallinity of film. Ferromagnetic resonance was observed for as-deposited and field-annealed films. The ferromagnetic resonance frequency had shifted from 0.85 to 1.81 GHz as the annealing temperature was increased from 100 to 400 °C which was found to strongly correlate with the increase of saturation magnetization value. © 2012 Elsevier B.V. All rights reserved.