Large-scale synthesis of mixed valence K₃[Fe₂S₄] with high dielectric and ferrimagnetic characteristics.

ABSTRACT: High yields of phase-pure K₃[Fe₂S₄] are obtained using a fast, straight-forward, and efficient synthetic technique starting from the binary precursors K₂S and FeS, and elemental sulphur. The compound indicates soft ferrimagnetic characteristics with magnetization of 15.23 A m² kg^-1 at 300 K due to the mixed valence of Fe^II/Fe^III. Sintering at different temperatures allows the manipulation of the microstructure as well as the ratio of grains to grain boundaries. This results in a variation of dielectric and impedance properties. Samples sintered at 923 K demonstrate a dielectric constant (κ) of around 1750 at 1 kHz, which lies within the range of well-known high-κ dielectric materials, and

SUBMITTER: Ghazanfari MR 

PROVIDER: S-EPMC9597588 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature