Abstract
Porous magnesium ferrite film was fabricated via a single-source precursor strategy involving thermal conversion of Mg (II)Fe (III)-layered double hydroxide (MgFe-LDH) precursor film formed in situ on sulfonated silicon substrate, followed by selective etching of excessive MgO phase in the calcined precursor film. XRD and EDS analyses confirm the formation of single phase MgFe 2O 4 after etching of MgO. The as-formed MgFe 2O 4 film exhibits porous and particulate structure consisting of fused particle aggregates. AFM observation reveals the rough surface nature of the ferrite film. The magnetic characterization shows the enhanced saturation magnetization of MgFe 2O 4 film (c.a. 37.1 emu/g), compared to that of MgFe 2O 4 powder synthesized by a conventional solid-state reaction. Importantly, the temperature-dependent magnetization of MgFe 2O 4 film exhibits unusual superparamagnetic characteristic. In addition, the film modified with organic molecule shows superhydrophobicity. Such significant magnetic and interfacial property of ferrite film can open up new opportunities for advanced applications of this material.
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