Investigation of the chemical structure of core–shell Fe 3 O 4 @Ni 1− x Co x Fe 2 O 4 nanoparticles and its influence on their magnetic properties
Abstract
O wüstite phase forms at the periphery, as also suggested by microscopy, introducing small exchange-bias effects. Alongside the exchange bias effect, a comprehensive magnetic characterization using SQUID magnetometry revealed the role of both the shell composition and the surface anisotropy, the latter being dominant over the shell composition when the core nanoparticle size was reduced. This multi-technique study unveils the formation mechanism of such core-shell bimagnetic nanoparticles and the intricate interplay between composition, interface structure, and magnetic behavior. It provides a potential framework for designing chemically engineered, anisotropy-tailored magnetic nanostructures for spintronic, biomedical, and high-density data storage applications.
Fields of Study & Subjects
Magnetic Properties and Synthesis of Ferrites
Nanoparticle-Based Drug Delivery
Magnetic properties of thin films
Publication details
- Journal / source
- Nanoscale Advances
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 8
- Issue
- 15
- Pages
- 4255–4269
- Publication date
- 1 January 2026
- Language
- EN