In this paper, we present the synthesis and studies of physical properties of the ferroelectromagnetic composites (1–x)PbMn_1/3Ta_2/3O₃–xPbTiO₃ [(1–x)PMnT–xPT], which exhibit a relaxor behavior. Using a synergistic application of scanning electron microscopy (SEM), X-ray structure analysis, and energy-dispersive X-ray analysis (EDX), we revealed that two phases always coexist in the synthesis of the composition PbMn_1/3Ta_2/3O₃ (PMnT), one phase of which has a pyrochlore structure, and the other has a pseudo-cubic cell of the perovskite structure. We further demonstrated that doping with lead titanate PbTiO₃ (PT) suppresses the dielectric polarization’s relaxor behavior. Using X-ray diffraction techniques at room temperature, we studied the dependencies of the structural parameters of each phase on the mole fractions of PT. The dielectric characteristics were studied at various frequencies by the dielectric spectroscopy method, and the dependency of the bandgap E_g on the dopant’s mole fractions was determined by the optical absorption method. The dopant’s influence on the IR Fourier spectra and magnetic hysteresis loops was analyzed. The magnetodielectric and magnetoresistive effects in these composites were studied.

在本文中，我们介绍了铁电磁复合材料（1– x）PbMn _1/3 Ta _2/3 O ₃ – x PbTiO ₃ [（1– x）PMnT– x PT]的合成和物理性能的研究。放松行为。使用扫描电子显微镜（SEM），X射线结构分析和能量色散X射线分析（EDX）的协同应用，我们发现合成PbMn _1/3 Ta _{2 /的过程中}总是共存两相₃ Ø ₃（PMnT），其一相具有烧绿石结构，另一相具有钙钛矿结构的拟立方晶胞。我们进一步证明，用钛酸铅PbTiO ₃（PT）掺杂可以抑制介电极化的弛豫行为。在室温下使用X射线衍射技术，我们研究了各相结构参数对PT摩尔分数的依赖性。用介电谱法研究了各种频率下的介电特性，以及带隙E _g的依赖性。通过光学吸收法确定掺杂剂的摩尔分数。分析了掺杂剂对红外傅里叶光谱和磁滞回线的影响。研究了这些复合材料的磁电和磁阻效应。