Controlled synthesis of nanocrystalline spinel ferrites are of immense importance owing to their interesting magnetic characteristics at nanoscale that leads not only to study the process of magnetization in them at that scale but also to use them for the development of various functional devices. Among largely-favoured low-temperature solution-based processing methods, as demonstrated in our earlier work, microwave-irradiation-assisted synthesis technique (MAST) offers rapid way to obtain pure crystallites with very narrow size distribution. However, the use of surfactant and the need of post-synthesis anneal was unavoidable in order to control distribution and growth of particle size. In this work we will demonstrate surfactant-free and anneal-free synthesis of zinc ferrite nanocrystallites with tunable physical and chemical properties by same MAST but with slightly altered synthesis conditions. Furthermore we will also show the effect of processing conditions on their properties.
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