Enhanced Magnetic Properties of Zn Substituted Mg Ferrite
| Autor: | Geovani Ferreira Barbosa, Adolfo Franco, Marcelo Seixo de Brito e Silva, Alexandre Ricalde Rodrigues, F.L.A. Machado |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Magnetics. 49:4562-4564 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2013.2261979 |
| Popis: | A study of the magnetic properties of nanoparticulate powders of ${\rm Mg}_{0.6}{\rm Zn}_{0.4}{\rm Fe}_{2}{\rm O}_{4}$ mixed ferrites prepared by a combustion reaction method is presented. Measurements of the magnetization $(M)$ and of the $ac$ magnetic susceptibility $(\chi_{\rm ac})$ were carried out for temperature $(T)$ and applied magnetic fields $(H)$ in the ranges of 2–300 K and $\pm$ 85 kOe, respectively. The coercive field $H_{c}$ was found to be nearly T-independent (11.6–13.7 Oe) cooling the sample from 300 to 2 K. The remanence $M_{r}$ and the magnetization at the highest applied field $M(H=85\ {\rm kOe})$ were found to increase from 1.6 to 4.5 emu/g and from 58.5 to 105.0 emu/g, respectively, for temperatures in the same range. The values of $M(H=85\ {\rm kOe})$ , $H_{c}$ and $M_{r}$ were found to be highly enhanced relative to nondoped samples and samples with higher average particle size. |
| Databáze: | OpenAIRE |
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