Abstract

Experimental data on transmission and reflection of millimeter-wavelength electromagnetic radiation for an artificial crystal are used to estimate nonuniformity of electromagnetic field inside the crystal and dependence of nonuniformity on magnetic field. Nanocomposite materials based on opal matrices with periodically spaced ferrimagnetic nickel–zinc ferrite spinel particles or ferromagnetic metal-cobalt particles serve as artificial crystals. The measurements are performed at frequencies ranging from 26 to 38 GHz in the presence of magnetic fields of up to 12 kOe. The calculations show a rapid decrease in the nonuniformity of electromagnetic field on a microscale under conditions for ferromagnetic resonance.

中文翻译：

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具有铁磁粒子的人工晶体中电磁场非均匀性的共振变化

摘要

关于人造晶体毫米波电磁辐射的透射和反射的实验数据用于估计晶体内部电磁场的不均匀性以及该不均匀性对磁场的依赖性。基于蛋白石基质的纳米复合材料具有周期性间隔的亚铁磁性镍锌铁氧体尖晶石颗粒或铁磁性金属钴颗粒，可作为人造晶体。在存在高达12 kOe的磁场的情况下，在26至38 GHz的频率范围内执行测量。计算结果表明，在铁磁谐振条件下，微尺度上电磁场的不均匀性迅速降低。