Synthesis, structural, optical and dielectric properties of transition metal doped ZnMnO nanoparticles by sol-gel combustion technique

被引：10

作者：

Dar, M. A. ^{[1
]}

Varshney, Dinesh ^{[1
]}

机构：

[1] Devi Ahilya Univ, Sch Phys, Mat Res Lab, Khandwa Rd Campus, Indore 452001, Madhya Pradesh, India

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2018年 / 114卷

关键词：

Sol-gel; X-ray diffraction; Rietveld; Transmission spectroscopes; Band gap; ELECTRICAL-PROPERTIES; MAGNETIC-PROPERTIES; TIN OXIDE; ZNO; FILMS; RAMAN; BULK; SEMICONDUCTORS;

D O I：

10.1016/j.spmi.2017.12.047

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Nanocrystalline samples of Zn0.94Mn0.06O and transition metal (TM) doped Zn0.94Mn0.01TM0.05O (TM = Co, Ni, and Cu) were prepared by sol-gel auto combustion method. X-ray diffraction (XRD) pattern infers that all synthesized samples except Zn0.94Mn0.01Ni0.05O and Zn0.94Mn0.01Cu0.05O with secondary phases of NiO and CuO are in single phase with hexagonal wurtzite structure (P6(3)mc space group). Raman spectroscopy reveals four vibrational phonon modes are centered at 331, 380, 410, and 438 cm(-1), assigned as E-2 (H)-E-2(L), A(1)(TO), E-1(TO), and E-1(LO) modes, respectively. A Raman spectrum of Zn0.94Mn0.01TM0.05O is entirely different from undoped Zn0.94Mn0.06O sample. Also, the infrared spectrum of transition metal doped samples is completely different from undoped Zn0.94Mn0.06O. Similar spectra are observed for Zn0.94Mn0.01Co0.05O, Zn0.94Mn0.01NiO, Zn0.94Mn0.01Cu0.05O and Zn0.94Mn0.01Zn0.05O samples. It was found that the band gap of Zn0.94Mn0.06O increased from 3.19 to 3.25eV by doping 5% transition metal oxide. Improved dielectric constant and reduced dielectric loss is measured for Zn0.94Mn0.01Ni/Cu0.05O as compared to Zn0.94Mn0.06O. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：340 / 354

页数：15

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