Magnetic properties of Fe-doped NiO nanoparticles.

ABSTRACT: Undoped and Fe-doped NiO nanoparticles were successfully synthesized using a lyophilization method and systematically characterized through magnetization techniques over a wide temperature range, with varying intensity and frequency of the applied magnetic fields. The Ni_1-xFe_xO nanoparticles can be described by a core-shell model, which reveals that Fe doping enhances exchange interactions in correlation with nanoparticle size reduction. The nanoparticles exhibit a superparamagnetic blocking transition, primarily attributed to their cores, at temperatures ranging from above room temperature to low temperatures, depending on the Fe-doping level and sample synthesis temperature. The nanoparticle shells also exhibit a transition at low temperatures, in this case to a clu

SUBMITTER: de Brito AS 

PROVIDER: S-EPMC10746408 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature