Double perovskite La₂CrMnO₆ ceramics was sintered using standard high temperature route in ambient air. The orthorhombic Pbnm cell characterized by a total disorder between Cr and Mn ions was determined using an XRD powder test. The grain morphology, porosity and chemical composition were determined using scanning electron microscopy. The X-ray photoemission spectroscopy showed several contributions to O 1 s, La 3d, Mn 2p, and Cr 2p core lines related to the occurrence of multiple ionic states. The electrical permittivity, modulus, AC and DC conductivity were measured in ranges of f = 20 Hz – 1 MHz and 76–440 K. The electrical transport mechanism was attributed to the small polarons. The nearest neighbor hopping occurred in the range 170 to 440 K. The variable range hoping, attributed to the Fermi glass features and disorder, was detected in the range 100 to 160 K. The relaxation process related to the temperature-independent activation energy was deduced from the electric modulus scaling.

使用标准高温途径在环境空气中烧结双层钙钛矿La ₂ CrMnO ₆陶瓷。使用XRD粉末测试确定了以Cr和Mn离子之间的总无序为特征的斜方Pbnm细胞。使用扫描电子显微镜确定晶粒形态，孔隙率和化学组成。X射线光电子能谱显示了对O 1 s，La 3d，Mn 2p和Cr 2p芯线的贡献，这些芯线与多种离子态的发生有关。在f的范围内测量介电常数，模量，AC和DC电导率 = 20 Hz – 1 MHz和76–440K。电传输机制归因于小极化子。最近的邻居跳跃发生在170至440 K的范围内。归因于费米玻璃特征和无序的可变范围跳跃在100至160 K的范围内被检测到。推导了与温度无关的活化能相关的弛豫过程从电模量缩放。