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首页> 外文期刊>Physica, B. Condensed Matter >Dielectric relaxation of complex perovskite Sm(Ni_(1/2)Zr _(1/2))O_3
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Dielectric relaxation of complex perovskite Sm(Ni_(1/2)Zr _(1/2))O_3

机译：复杂钙钛矿Sm（Ni_（1/2）Zr _（1/2））O_3的介电弛豫

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摘要

Complex perovskite oxide samarium nickel zirconate, Sm(Ni _(1/2)Zr_(1/2))O_3 (SNZ), is synthesized by a solid-state reaction technique. X-ray diffraction of the sample at room temperature shows a monoclinic phase. Impedance spectroscopy is used to study the electrical behaviour of this material in the frequency range 400 Hz1 MHz and in the temperature range 303633 K. The frequency dependence of loss peaks is found to obey an Arrhenius law with the activation energy of 0.8 eV. Frequency-dependent conductivity spectra follow a power law. Relaxation mechanism of the sample in the framework of electric modulus formalism is modelled by the ColeCole equation. The scaling behaviour of the imaginary part of electric modulus suggests that relaxation describes the same mechanism at various temperatures. Complex impedance plane plot shows two semicircular arcs, indicating the grain and grain-boundary contributions of dielectric relaxation in this material.
机译：通过固相反应技术合成了复合钙钛矿型sa锆酸锆镍，Sm（Ni _（1/2）Zr_（1/2））O_3（SNZ）。样品在室温下的X射线衍射显示为单斜晶相。阻抗谱用于研究该材料在400 Hz1 MHz频率范围内和303633 K温度范围内的电学行为。发现损耗峰的频率依赖性遵循激活能量为0.8 eV的阿伦尼乌斯定律。随频率变化的电导率谱遵循幂律。用ColeCole方程对样品在电模量形式主义框架内的弛豫机理进行建模。电模量的虚部的缩放行为表明，松弛描述了在不同温度下的相同机理。复阻抗平面图显示了两个半圆弧，表明该材料中介电弛豫的晶粒和晶粒边界贡献。

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