Electron paramagnetic resonance study of ZnO varistor material

被引：38

作者：

Baraki, Raschid ^{[1
]}

Zierep, Paul ^{[2
]}

Erdem, Emre ^{[2
]}

Weber, Stefan ^{[2
]}

Granzow, Torsten ^{[3
]}

机构：

[1] Tech Univ Darmstadt, Inst Mat Wissensch, D-64287 Darmstadt, Germany

[2] Univ Freiburg, Inst Phys Chem, D-79104 Freiburg, Germany

[3] Ctr Rech Publ Gabriel Lippmann, L-4422 Belvaux, Luxembourg

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2014年 / 26卷 / 11期

关键词：

EPR spectroscopy; ZnO varistors; doping; NONOHMIC PROPERTIES; GREEN LUMINESCENCE; QUANTUM DOTS; PHOTOLUMINESCENCE; EPR; EMISSION; DEFECTS; FERROELECTRICS; FERROMAGNETISM; NANOPARTICLES;

D O I：

10.1088/0953-8984/26/11/115801

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

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+ C EPR signal was strongly suppressed or masked by a Mn2+ C 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.

引用

页数：6

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