Phase Formation Mechanism and Anomalous Magnetic Variation of High-Performance La-Co-Doped Strontium Ferrites.

ABSTRACT: La-Co-doped ferrite is widely used due to its excellent magnetic properties, but the mechanisms of La-Co doping on its phase formation and magnetic properties remain unclear. This study clarifies the phase formation mechanisms and reveals that La-Co doping reduces the formation temperatures of the intermediate phase SrFeO_3-x and thus the final SrFe₁₂O₁₉ phase. This promotes complete formation of SrFe₁₂O₁₉, enhancing saturation magnetization. The unexpected change in coercivity after La-Co doping contradicts the variation in the determined magnetocrystalline anisotropy field. We identify that it arises from the La-Co doping lowering the formation temperature of SrFe₁₂O₁₉, leading to excessive particle growth

SUBMITTER: Fu P 

PROVIDER: S-EPMC11766773 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature