Structural, optical, electrical, dielectric, molecular vibrational and magnetic properties of La3+ doped Mg-Cd-Cu ferrites prepared by Co-precipitation technique
Structural, optical, electrical, dielectric, molecular vibrational and magnetic properties of La3+ doped Mg-Cd-Cu ferrites prepared by Co-precipitation technique
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DOI：
10.1016/j.ceramint.2022.01.313
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发表时间：
2022-04-06
影响因子：
5.2
通讯作者：
Nguyen Thi Kim Thanh
中科院分区：
文献类型：
--
作者：
Arshad, Muhammad Imran;Hasan, M. S.;Nguyen Thi Kim Thanh
铁氧体是最经常研究的材料之一，主要是由于有趣的和实际上不同的属性。因此，采用共沉淀法合成了简单、经济的La掺杂Mg0.5Cd0.25Cu0.25Fe2-xLaxO 4（x = 0.0，0.0125，0.025，0.0375和0.05）铁氧体，并对其结构、光学、电学、介电、分子振动和磁学性能进行了综合表征。X射线衍射分析证实了立方尖晶石结构的形成。由于La 3+离子的插入，还观察到频带的变化，光学带隙能量（2.95 - 3.38 eV）放大。随着La 3+含量的增加，电阻率在低温和高温下有相反的趋势。居里温度，激活能，和漂移迁移率也被确定为具有与软铁氧体的半导体行为相一致的值。当La ~（3+）浓度x = 0.05时，饱和磁化强度（MS）最大，为49.385 emu/g，剩余磁化强度（Mr）为34.928 emu/g，磁化强度为661.4 Oe。当La ~（3+）浓度x = 0.025时，介电损耗最小。此外，电阻率（ρ）具有对于La 3+浓度x = 0.025的7.95 × 10（4）Ω cm的最大值。在3.36 - 10.80 GHz的微波频段内，对La 3+掺杂Mg-Cd-Cu铁氧体的计算频率范围进行了检测，表明该材料在纵向记录介质和微波吸收方面具有潜在的应用前景。
Ferrites are among the most frequently investigated materials mainly due to interesting and practically different properties. Therefore, easily and cost-effective lanthanum doped Mg0.5Cd0.25Cu0.25Fe2-xLaxO4 (x = 0.0, 0.0125, 0.025, 0.0375 and 0.05) ferrites were synthesized by a co-precipitation route, a comprehensive characterisation of their structural, optical, electric, dielectric, molecular vibrational, and magnetic properties were carried out. X-ray diffraction analysis confirmed the formation of a cubic spinel structure. Variations in frequency bands were also observed with amplification in optical band gap energy (2.95 - 3.38 eV) due to La3+ ions insertion. The electric resistivity had opposite trends at low and high temperatures with increasing La3+ content. The Curie temperature, activation energy, and drift mobility were also determined to have values consistent with the semiconducting behavior of the soft ferrites. The saturation magnetization (MS) has a maximum value 49.385 emu/g with remanent magnetization (Mr) was 34.928 emu/g and coercivity 661.4 Oe for La3+ concentration x = 0.05. The minimum dielectric loss was observed for La3+ concentration x = 0.025. Moreover, the resistivity (rho) has a maximum value of 7.95 x 10(4) omega & nbsp;cm for La3+& nbsp;concentration x = 0.025. The calculated frequency range of La3+& nbsp;doped Mg-Cd-Cu ferrites was detected in the microwave range (3.36 - 10.80 GHz), suggesting the potential application of the materials in longitudinal recording media and microwave absorbance.