Effect of the La3+ ions substitution on the magnetic properties of spinal Li-Zn-ferrites at low temperature
| Autor: | Mahmoud Hammam, Ahmed Ali, Jong Yeog Son, N. Okasha, M.A. Ahmed |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Phase transition
Materials science Metals and Alloys Analytical chemistry DTA analyses Infrared spectroscopy Atmospheric temperature range Surfaces Coatings and Films Biomaterials Paramagnetism Magnetization Low temperature magnetization Ferromagnetism IR spectroscopy Ferrimagnetism Ceramics and Composites Curie temperature Rare earth-Li-Zn-ferrite Magnetic hysterics loop at low temperature |
| Zdroj: | Journal of Materials Research and Technology. 2:356-361 |
| ISSN: | 2238-7854 |
| DOI: | 10.1016/j.jmrt.2013.09.001 |
| Popis: | The effect of La 3+ ions substitution on the magnetic properties of the composition Li 0.5−0.5 x Zn y La x Fe 2.5−0.5 x − y O 4 (0.02 ≤ x ≤ 0.1; y = 0.6) was studied. The structure of the samples was investigated using X-ray, SEM and IR. Both of zero field cooled (ZFC) and field cooled (FC) modes magnetization were studied at low temperature range (2 K ≤ T ≤ 400 K). Magnetization applied field-dependence ( M – H ) curves were measured at low temperature (5 K). The experimental data revealed that the samples exhibited a phase transition from ferrimagnetic state at low temperature to paramagnetic state at high temperature (400 K). The obtained Curie temperature was shifted to lower value with La 3+ -content. The M – H carves showed that the samples are soft ferromagnetic and it can be an excellent candidate for industrial applications. |
| Databáze: | OpenAIRE |
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