A series of Agx-substituted Co0.05−x Zn0.95O (x = 0.00–0.05) nanoparticles calcined at 700 °C have been synthesized using a simple co-precipitation technique. The prepared nanoparticles have been analyzed for their structural, optical, magnetic, and dielectric properties using X-ray diffractometer, Fourier infrared spectroscopy, UV–visible spectroscopy, vibrating sample magnetometer, and inductor capacitor and resistor meter, respectively. The XRD results verify the formation of pure hexagonal wurtzite structure. FTIR spectra show a band at 439 cm−1 that is the characteristic stretching band of Zn–O which also confirms the formation of hexagonal structure. The band-gap energy decreases as the concentration of Ag increases except for samples with concentration x = 0.01 and x = 0.03. VSM results reveal that nanoparticles exhibit ferromagnetism at room temperature. The dielectric constant and tangent loss decreases with increasing frequency. However, the a.c. conductivity increases with increasing frequency. The prepared nanoparticles can be used in a variety of applications such as optoelectronic, memory, and microelectronic devices.

中文翻译：

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共沉淀法制备Agx取代Co0.05-x Zn0.95O稀磁半导体的磁介电性能研究

使用简单的共沉淀技术合成了一系列在 700°C 下煅烧的 Agx 取代的 Co0.05-x Zn0.95O（x = 0.00-0.05）纳米颗粒。分别使用 X 射线衍射仪、傅里叶红外光谱、紫外-可见光谱、振动样品磁强计以及电感电容和电阻计分析了制备的纳米颗粒的结构、光学、磁性和介电性能。XRD结果验证了纯六方纤锌矿结构的形成。FTIR 光谱显示 439 cm-1 处的带是 Zn-O 的特征伸缩带，这也证实了六边形结构的形成。除了浓度 x = 0.01 和 x = 0.03 的样品外，带隙能量随着 Ag 浓度的增加而降低。VSM 结果表明纳米颗粒在室温下表现出铁磁性。介电常数和切线损耗随着频率的增加而降低。然而，交流电导率随着频率的增加而增加。制备的纳米颗粒可用于多种应用，如光电、存储器和微电子器件。