研究目的
Investigating the structural, magnetic, and dielectric properties of CoFe2O4 @ BiFeO3 and BiFeO3@ CoFe2O4 core-shell nanocomposites synthesized by chemical co-precipitation method.
研究成果
The study successfully synthesized and characterized CFO, BFO, and their core-shell nanocomposites, revealing enhanced magnetic and dielectric properties in CFO@BFO compared to BFO@CFO. The incongruity in dielectric constant near the antiferromagnetic transition temperature of BFO indicates magnetoelectric coupling.
研究不足
The presence of impurity phases in BFO due to its narrow temperature range of phase stabilization and the challenge in achieving pure phase synthesis.
1：Experimental Design and Method Selection:
Chemical co-precipitation method was used for synthesis.
2：Sample Selection and Data Sources:
Cobalt nitrate and iron nitrate were used for CFO synthesis; bismuth nitrate and iron nitrate for BFO synthesis.
3：List of Experimental Equipment and Materials:
X-ray di?raction (XRD), field emission scanning electron microscope (FESEM), high resolution transmission electron microscopy (HRTEM), vibrating sample magnetometer (VSM), impedance analyzer.
4：Experimental Procedures and Operational Workflow:
Synthesis involved dissolving precursors, adding surfactant, precipitating with NH3, drying, and annealing at various temperatures.
5：Data Analysis Methods:
XRD for crystallinity and phase formation, FESEM and HRTEM for morphology, VSM for magnetic properties, impedance analyzer for dielectric properties.
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