Abstract The spinel La–Zn co-doped strontium nanoferrites having general formula of Sr1-xLaxFe2-yZnyO4 (0.0≤x ≤ 0.1, 0.0≤y ≤ 1.0) have been synthesized. X-ray diffraction studies have been revealed successful fabrication of ferrites. Scanning electron microscopy results have shown that size of the particle of the ferrite samples lie in nano-range. DC electrical resistivity at room temperature increases with La3+ and Zn2+ ions concentration while dielectric parameters and AC conductivity decreases with concentration of these ions. Frequency dependent behavior of dielectric parameters has shown that values of these dielectric parameters decrease with frequency initially at lower values of frequency and then become almost constant at higher values of frequency. Electrochemical impedance spectroscopy data shows that the charge transfer phenomenon is mainly controlled by grain boundaries. Further, enhanced DC resistivity ranging from 1.08 × 109 to 1.67 × 109 Ω cm and low dielectric loss values of the La–Zn co-doped strontium nanoferrites suggest their applications in high frequency devices.

中文翻译：

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用于高频器件应用的高电阻 La-Zn 共取代尖晶石锶纳米铁氧体的制备

摘要 合成了通式为Sr1-xLaxFe2-yZnyO4（0.0≤x≤0.1，0.0≤y≤1.0）的尖晶石La-Zn共掺杂锶纳米铁氧体。X 射线衍射研究已经表明铁氧体的成功制造。扫描电镜结果表明铁氧体样品的颗粒尺寸在纳米范围内。室温下的直流电阻率随着 La3+ 和 Zn2+ 离子浓度的增加而增加，而介电参数和交流电导率随着这些离子浓度的增加而降低。介电参数的频率相关行为已经表明，这些介电参数的值最初在较低频率值处随频率降低，然后在较高频率值处变得几乎恒定。电化学阻抗谱数据表明电荷转移现象主要受晶界控制。此外，从 1.08 × 109 到 1.67 × 109 Ω cm 的增强直流电阻率和 La-Zn 共掺杂锶纳米铁氧体的低介电损耗值表明它们在高频器件中的应用。