Synthesis and Magnetic Properties of La ۰.۶۷Sr۰.۳۳MnO ۳ Ceramics via Sol -Gel and Spark Plasma Sintering

Ferromagnetic La۰.۶۷Sr۰.۳۳MnO۳ ceramics were synthesized using an innovative combination of the sol-gel method and Spark Plasma Sintering at ۸۰۰°C for just ۱۰ minutes, significantly reducing processing time. Room-temperature hysteresis loops showed magnetization values of ۵۰ emu/g for powder, and ۹.۹ and ۲۵ emu/g for ceramics before and after oxygen annealing, respectively. The results in ceramic before oxygen annealing indicated lower Mn⁴⁺ content and potential heterogeneity in Mn⁴⁺ distribution, affecting magnetic properties. Surface morphology was analyzed using field emission scanning electron microscopy.

کلیدواژه ها:

manganite ، spark plasma sintering ، sol-gel