Rinkevich Anatoly B, Perov Dmitry V, Kuznetsov Evgeny A, Stenina Maria S
M.N. Miheev Institute of Metal Physics UB RAS, Sofia Kovalevskaya St., 18, 620108 Ekaterinburg, Russia.
Nanomaterials (Basel). 2025 Jun 26;15(13):995. doi: 10.3390/nano15130995.
The complex dielectric permittivity has been studied with the waves of millimeter wavelength for rare earth manganate and titanate and LiCoPO and LiNiCoPO orthophosphate composites. The measurements are carried out at frequencies of 26 to 38 GHz via measurements of transmission and reflection coefficients through a plate. A special method on how to extract the real and imaginary parts of dielectric permittivity is applied. Discussion is conducted on a nonmonotonic type of the frequency dependences for both real and imaginary parts of permittivity, and it has been shown that relaxation is non-Debye. The Cole-Cole, Havriliak-Negami, and Kohlrausch-Williams-Watts models cannot also explain the nonmonotonic frequency dependence of the real part of dielectric permittivity. Investigation of the structure and phase composition of nanocomposites has been carried out.
利用毫米波对稀土锰酸盐、钛酸盐以及磷酸锂钴（LiCoPO）和磷酸锂镍钴（LiNiCoPO）正磷酸盐复合材料的复介电常数进行了研究。通过测量穿过平板的透射系数和反射系数，在26至38吉赫兹的频率下进行测量。应用了一种特殊方法来提取介电常数的实部和虚部。对介电常数实部和虚部的非单调频率依赖性进行了讨论，结果表明弛豫是非德拜型的。科尔 - 科尔（Cole - Cole）、哈弗利亚克 - 内加米（Havriliak - Negami）和科尔劳施 - 威廉姆斯 - 瓦特（Kohlrausch - Williams - Watts）模型也无法解释介电常数实部的非单调频率依赖性。对纳米复合材料的结构和相组成进行了研究。
