Baraki, Raschid ; Zierep, Paul ; Erdem, Emre ; Weber, Stefan ; Granzow, Torsten (2014)
Electron paramagnetic resonance study of ZnO varistor material.
In: Journal of Physics: Condensed Matter, 26 (11)
doi: 10.1088/0953-8984/26/11/115801
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Matsuoka-type zinc oxide (ZnO) varistor material was synthesized using a conventional solid-state reaction method. X-band electron paramagnetic resonance (EPR) data revealed that Mn ions substitute in the ZnO lattice with a 2+ paramagnetic state. Co ions with either 3+ or 2+ oxidation states are only detectable at cryogenic temperatures. A Cr3+ EPR signal was strongly suppressed or masked by a Mn2+ signal. Photoluminescence and electrical results indicated that the varistor sample has fewer intrinsic defects and much higher resistivity as compared to undoped and metal-ion doped ZnO.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Baraki, Raschid ; Zierep, Paul ; Erdem, Emre ; Weber, Stefan ; Granzow, Torsten |
| Art des Eintrags: | Bibliographie |
| Titel: | Electron paramagnetic resonance study of ZnO varistor material |
| Sprache: | Englisch |
| Publikationsjahr: | 19 März 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Condensed Matter |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1088/0953-8984/26/11/115801 |
| Kurzbeschreibung (Abstract): | Matsuoka-type zinc oxide (ZnO) varistor material was synthesized using a conventional solid-state reaction method. X-band electron paramagnetic resonance (EPR) data revealed that Mn ions substitute in the ZnO lattice with a 2+ paramagnetic state. Co ions with either 3+ or 2+ oxidation states are only detectable at cryogenic temperatures. A Cr3+ EPR signal was strongly suppressed or masked by a Mn2+ signal. Photoluminescence and electrical results indicated that the varistor sample has fewer intrinsic defects and much higher resistivity as compared to undoped and metal-ion doped ZnO. |
| Freie Schlagworte: | EPR spectroscopy, ZnO varistors, doping |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 04 Mär 2014 09:12 |
| Letzte Änderung: | 30 Jul 2015 08:50 |
| PPN: | |
| Sponsoren: | This work has been financed by the DFG grant ER 662/1-1. |
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