Synthesis, microstructure, and magnetic properties of monosized Mn _<i>x</i> Zn _<i>y</i> Fe _{3 &#x2212; <i>x</i> &#x2212; <i>y</i>} O ₄ ferrite nanocrystals

다국어 초록 (Multilingual Abstract)

<P>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.</P>