In this study, magnesium‐zirconium–substituted M‐type barium hexaferrites BaFe_12‐2xMg+_xZr_xO₁₉ (BFMZO, 0.25 ≤ x ≤ 1.5) nanoparticles were successfully synthesized by sol‐gel autocombustion technique. On one hand, the effects of Mg‐Zr substitution concentration on the magnetic features of doped magnetic nanoparticles were investigated which showed that increasing the doping concentration causes the saturation magnetization to decrease. On the other hand, the influence of the different layer thicknesses (2, 3, and 4 mm) of BFMZO on the microwave absorption was investigated in X‐band frequencies (8‐12 GHz). Absorption results showed that increasing the film thickness from 2 to 3 mm causes microwave absorption to increase. Moreover, the morphological study reveals that aggregation percentage decreased when the substitution concentration increased. Therefore, size, magnetic, and absorption properties are tunable by substitution concentration.

中文翻译：

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Mg-Zr替代对BaFe12-2xMgxZrxO19（0.25≤x≤1.5）的电磁吸收特性的影响

在这项研究中，镁-锆-取代的M型钡铁氧体的钡铁氧体_{12-2 X}的Mg + _X的Zr _X ø ₁₉（BFMZO，0.25≤  X ≤1.5）通过溶胶-凝胶自燃技术成功合成了纳米颗粒。一方面，研究了Mg-Zr替代浓度对掺杂磁性纳米颗粒磁性特征的影响，结果表明，增加掺杂浓度会使饱和磁化强度降低。另一方面，在X波段频率（8-12 GHz）中研究了BFMZO的不同层厚度（2、3和4 mm）对微波吸收的影响。吸收结果表明，将膜厚度从2 mm增加到3 mm会导致微波吸收增加。此外，形态学研究表明，当取代浓度增加时，聚集百分比降低。因此，尺寸，磁性和吸收性质可通过取代浓度来调节。