Production of Zinc-Doped Yttrium Ferrite Nanopowders by the Sol–Gel Methodстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:Zinc-doped yttrium orthoferrite nanocrystals having the perovskite structure were prepared by
coprecipitation of yttrium, zinc, and iron hydroxides. The limiting zinc doping level of the yttrium ferrite to
yield a ZnFe2O4 spinel second phase was determined. The yttrium orthoferrite particle size was found to be a
nonmonotone function of dopant concentration. The specific magnetization of yttrium ferrite nanocrystals
increases with increasing zinc doping level from 0.242 A m2/kg (in undoped YFeO3) to 1.327 A m2/kg (the
ratio (1 – x)YFeO3 : xZn (x = 0.4)) at Т = 300 K in 1250-kA/m field. A zinc ferrite impurity in samples
enhances the ferromagnetism of the material.