Synthesis, microstructure, and magnetic properties of monosized MnxZnyFe3 - x - yO4 ferrite nanocrystals.

Hayoung Yoon, Ji Sung Lee, Ji Hyun Min, Junhua Wu, Young Keun Kim

Index: Nanoscale Res. Lett. 8 , 530, (2013)

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Abstract

We report the synthesis and characterization of ferrite nanocrystals which exhibit high crystallinity and narrow size distributions. The three types of samples including Zn ferrite, Mn ferrite, and Mn-Zn ferrite were prepared via a non-aqueous nanoemulsion method. The structural, chemical, and magnetic properties of the nanocrystals are analyzed by transmission electron microscopy, X-ray diffraction, X-ray fluorescence, and physical property measurement system. The characterization indicates that the three types of ferrite nanocrystals were successfully produced, which show well-behaved magnetic properties, ferrimagnetism at 5 K and superparamagnetism at 300 K, respectively. In addition, the magnetization value of the ferrites increases with the increasing concentration of Mn.