Anisotropic SmCo5/FeCo core/shell nanocomposite chips prepared via electroless coating
Abstract
We report the preparation of anisotropic SmCo5/FeCo core/shell nanocomposite chip-likeparticles via an electroless coating process. The anisotropic SmCo5 nanoscale chips were firstprepared by surfactant-assisted ball milling then coated with soft magnetic FeCo using cobalt sulfate(CoSO4.7H2O) and iron sulfate (FeSO4.7H2O) as metal precursors in presence of complexing agents.The influence of the soft-phase coating on the magnetic properties of the nanocomposite particles hasbeen studied. The saturation magnetization of the composite particles increases with increasingcoating while the coercivity decreases. The FeCo coated chips have an enhanced remanence (Mr =44.5 emu/g with 16 wt of FeCo) compared to the uncoated chips (Mr = 36.7 emu/g), indicatingexchange coupling between the hard and soft phases for the optimal soft-phase coating. Results ofmagnetic field alignment show the strong anisotropy of SmCo5/FeCo core/shell nanocompositeparticles which can be used as building blocks of high-strength anisotropic magnets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 2015
- Accession Number
- AD1058126
Entities
People
- J. Ping Liu
- Kevin Elkins
- Kinjal Gandha
- Narayan Poudyal