Sn²⁺ Doping: A Strategy for Tuning of Fe₃O₄ Nanoparticles Magnetization Dipping Temperature/Amplitude, Irreversibility, and Curie Point.

ABSTRACT: Doped magnetite (Sn_xFe_3-2/3xO₄) nanoparticles (NPs) (12-50 nm) with different amount of Sn²⁺ ions (x) were synthesized using co-precipitation method. Sn²⁺ doping reduces the anticipated oxidation of Fe₃O₄ NPs to maghemite (γ-Fe₂O₃), making them attractive in several magnetic applications. Detailed characterizations during heating-cooling cycles revealed the possibility of tuning the unusual observed magnetization dipping temperature/amplitude, irreversibility, and Curie point of these NPs. We attribute this dip to the chemical reduction of γ-Fe₂O₃ at the NPs surfaces. Along with an increase in the dipping temperature, we found that doping with Sn²⁺ reduces the

SUBMITTER: Al-Kindi USH 

PROVIDER: S-EPMC7530164 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature