Abstract
Doped strontium (Sr) hexaferrites appeared potential candidates for microwave absorber applications. Driven by this idea, we examined the influence of manganese (Mn) and yttrium (Y) co-substitution on the microstructures, morphology and magnetic properties of Sr nanohexaferrites (Sr1–xMnxFe12–yYyO19, where 0.0 ≤ x = y ≤ 0.5) synthesized via citrate sol-gel auto-combustion technique. As-prepared samples were thoroughly characterized using diverse analytical tools. X-ray diffraction pattern reveals a single M-hexagonal crystalline phase. FE-SEM, TEM, HR-TEM show a hexagonal platelet-like structure. The magnetic hysteresis loops (measured at room and low temperature) of the as-prepared nanohexaferrites exhibit ferromagnetic (FM) behavior. Magnetic parameters including the saturation magnetization, remanence, coercive and magneto-crystalline anisotropy field are found to decrease with the increase in Mn2+ and Y3+ contents. Zero- and normal-field cooled magnetization measurements in the range of 2–400 K display the complete absence of blocking temperature, confirming the characteristic ferromagnetic behavior of the proposed composition.
The influence of manganese (Mn) and yttrium (Y) co-substitution on the microstructural, morphological and magnetic properties of strontium nanohexaferrites (Sr1-xMnxFe12-yYyO19; 0.0 ≤ x = y ≤ 0.5) was examined. The magnetic hysteresis loops of the various produced nanohexaferrites indicate ferrimagnetic behavior. [Display omitted]