The effect of manganese substitution to gallium on the physical properties of MgGa2−xMnxO4 spinel type ceramic thermistors
| Autor: | G. Bailleul, S. Fourrez, Attila Veres, Jacques G. Noudem, Olivier Perez |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Inorganic chemistry Spinel Analytical chemistry chemistry.chemical_element engineering.material Microstructure chemistry Electrical resistivity and conductivity visual_art X-ray crystallography Materials Chemistry Ceramics and Composites visual_art.visual_art_medium engineering Ceramic Electroceramics Gallium Solid solution |
| Zdroj: | Journal of the European Ceramic Society. 27:3873-3876 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2007.02.129 |
| Popis: | Structural, electric and magnetic properties of MgGa 2− x Mn x O 4 based spinel type ceramic compounds have been studied. The samples, prepared by a solid state reaction method, were characterized by X-ray diffraction (XRD), temperature dependent resistivity measurements ρ ( T ) and magnetic measurements M ( T ). Mono-phase solid solutions were obtained for all samples in which magnetic ions interact antiferromagnetically at low temperature. For all samples NTC type behaviour is evidenced. The sensitivity range of these thermistors can be tuned by varying Mn content. The values of the effective magnetic momentum ( μ eff ) seem to confirm the well-known electron “hopping” mechanism of electrical conduction, which is believed to act in this kind of materials. |
| Databáze: | OpenAIRE |
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