CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES OF HIGHLY-COERCIVE Sr1–xGdxFe12–xZnxO19 FERRITES
Научная публикация
CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES  OF HIGHLY-COERCIVE Sr1–xGdxFe12–xZnxO19 FERRITES
Автор(ы): Wu Ze, L. A. Bashkirov, S. V. Slonskaya, S. V. Trukhanov, L. S. Lobanovskiy, A. I. Galyas
УДК: 541.124+546.431
Год издания: 2014
Дата загрузки: 01.12.2015
Загрузил(а): Рогова О. А.

Описание:
High-coercivity ferrite samples Sr1–xGdxFe12–xZnxO19(x = 0; 0.1; 0.2; 0.3; 0.4; 0.5) with magnetoplumbite structure were prepared from oxides Fe2O3, Gd2O3, ZnO and carbonate SrCO3by solid-state ceramic method, the dependence of the unit cell parameters aand con the value of xwas determined. XRD showed that the samples with x ≥0.1 were not single-phase, and the samples withx ≥0.2 contained not only bases phase with the structure of magnetplumbite, but also the α-Fe2O3and Gd3Fe5O12 phases. It was found that increase of the xvalue leads to a slight decrease in the Curie temperature (from 727 K for the basic ferrite SrFe12O19to 714 K for Sr1–xGdxFe12–xZnxO19solid solution with x = 0.5). It has been found that at 300 K values of spontaneous magnetization (no) and coercive force (σHc) of solid solution Sr0.9Gd0.1Fe11.9Zn0.1O19are respectively 1.3 and 2.3% higher than for the base ferrite SrFe12O19, and values of samples with x > 0.1 of these magnetic properties decreases gradually.

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ChemistryTechnology of Inorganic Materials and Substances