多晶Pr$_2$MgZrO$_6$的电输运性质与绝缘体-金属转变研究：来自电导率和阻抗谱的见解
Exploring the Electrical Transport Properties and Insulator-Metal Transition in Polycrystalline Pr$_2$MgZrO$_6$: Insights from Conductivity and Impedance Spectroscopy
AI总结：
该研究通过电导率和阻抗谱分析，发现多晶Pr$_2$MgZrO$_6$在约452 K发生绝缘体-金属转变，揭示了其导电机制随温度的变化。
摘要：
采用电导率和阻抗谱技术研究了多晶Pr$_2$MgZrO$_6$（PMZ）的交流电输运性质。通过X射线衍射和拉曼光谱研究的结合，确定了PMZ的晶体结构为单斜晶系。拉曼光谱中的Ag模式被确定为ZrO6八面体的呼吸振动。PMZ的交流电导率谱在不同温度范围内表现出不同的特征。在较低温度（低于420 K）下，谱图采用双幂律进行拟合，表明涉及多种微结构特征。另一方面，在较高温度（高于460 K）下，谱图遵循Jonscher定律，表明存在更简单的导电机制。通过对电导率、介电常数和阻抗的分析，在约452 K附近观察到绝缘体-金属转变。这一转变标志着PMZ电学性质的显著变化，并为其导电性质提供了有价值的见解。
英文摘要：
The ac electrical transport properties of polycrystalline Pr$_2$MgZrO$_6$ (PMZ) have been investigated using conductivity and impedance spectroscopic techniques. The crystal structure of PMZ has been determined to be monoclinic through a combination of X-ray diffraction and Raman spectroscopic studies. Ag mode in the Raman spectra has been identified as the breathing vibration of the ZrO6 octahedra. The ac conductivity spectra of PMZ exhibit distinct characteristics at different temperature ranges. At lower temperatures (less than 420 K), the spectra are fitted using a double power law, indicating the involvement of multiple microstructural features. On the other hand, at higher temperatures (greater than 460 K), the spectra follow Jonscher's law, suggesting a simpler conduction mechanism. Through the analysis of conductivity, permittivity, and impedance, an insulator-metal transition has been observed around 452 K. This transition signifies a significant change in the electrical properties of PMZ and provides valuable insights into its conductive nature.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
