The effect of different particle size obtained by diverse milling time towards the microstructure and magnetic properties of gadolinium iron garnet (GdIG) at room temperature was reported in this research work. Gadolinium iron garnet (GdIG) has been mechanically alloyed at 3, 6, 9 and 12 h followed by sintering at 1200 °C. The samples were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), vibrating sample magnetometer (VSM) and impedance analyser. All milled samples were in nanosized of 36.9, 27.2, 19.2 and 20.8 nm for 3, 6, 9 and 12 h, respectively. The single phase of gadolinium iron garnet (GdIG) with average grain size of 0.66, 0.67, 0.72 and 0.69 μm, respectively, showed low initial permeability and low magnetic loss when applied with low-frequency range. The effect of magnetic properties was proven to be dominantly contributed by sintering process. The result illustrated that the polycrystalline GdIG has the ability to be applied as potential patch antenna application.

中文翻译：

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多晶g铁石榴石（GdIG）中粒径变化的潜在贴片天线应用

这项研究工作报道了通过不同研磨时间获得的不同粒径对towards铁石榴石（GdIG）在室温下的微观结构和磁性的影响。3铁石榴石（GdIG）已在3、6、9和12小时进行机械合金化，然后在1200°C烧结。使用透射电子显微镜（TEM），X射线衍射（XRD），场发射扫描电子显微镜（FESEM），振动样品磁力计（VSM）和阻抗分析仪对样品进行表征。所有研磨的样品分别在3、6、9和12小时内分别处于36.9、27.2、19.2和20.8 nm的纳米尺寸。phase铁石榴石（GdIG）的单相平均粒径分别为0.66、0.67、0.72和0.69μm，在低频范围内使用时表现出较低的初始磁导率和较低的磁损耗。事实证明，烧结过程对磁性的影响最大。结果表明，多晶GdIG具有用作潜在贴片天线应用的能力。