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Synthesis and characterization of spinel ferrites for microwave devices
Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2021-01-30 , DOI: 10.1007/s10971-021-05470-9
Rabia Qindeel , Norah H. Alonizan , Eman A. Alghamdi , Manal A. Awad

The prepared ferrite system with chemical formula Mg0.6Li0.4YbxFe2−xO4; x = 0.00 and 0.1 having valuable magnetic and electrical properties. The X-ray diffraction data confirmed the cubic spinel structure with single phase. The one order increase in magnitude of dc resistivity was found with ‘Yb’ substitution as compared to Mg–Li based ferrites. The room temperature dielectric loss under the frequency of 3 GHz was 3 × 10−3. By using better stoichiometric ratio, size and the nature of substituted element, one can achieve suitable combination of low dielectric loss and high resistivity. In present work, the dielectric study (as a function of frequency) was done in frequency range of 0.1–20 MHz at different temperatures. The magnetic properties were measured up to applied field of 2 KOe. The low values of dielectric loss and high value of dc resistivity suggested that prepared samples may be suitable for microwave devices.



中文翻译:

微波器件尖晶石铁氧体的合成与表征

制备的化学式为Mg 0.6 Li 0.4 Yb x Fe 2-x O 4的铁氧体体系;x  = 0.00和0.1具有有价值的磁和电性能。X射线衍射数据证实了具有单相的立方尖晶石结构。与基于Mg-Li的铁氧体相比,用“ Yb”替代发现直流电阻率的幅度增加了一阶。3 GHz频率下的室温介电损耗为3×10 -3。通过使用更好的化学计量比,尺寸和被取代元素的性质,可以实现低介电损耗和高电阻率的适当组合。在目前的工作中,电介质研究(作为频率的函数)是在不同温度下在0.1–20 MHz的频率范围内进行的。在直至2 KOe的施加磁场下测量磁性能。低的介电损耗值和高的直流电阻率值表明制备的样品可能适用于微波设备。

更新日期:2021-01-31
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