Metal-insulator nanocomposite (CoFeB)_x(LiNbO₃)_1−x films are studied by the ferromagnetic resonance method in the temperature range of 4–320 K. In the low-temperature region, the maximum of the ferromagnetic resonance linewidth and a negative dynamic shift of the absorption peak, typical of the mechanism of slow ion relaxation on magnetic impurities, are found. The observed magnetic relaxation features can be caused by paramagnetic Co and Fe ions, which are dispersed in the dielectric LiNbO₃ matrix and are exchange-coupled to ferromagnetic CoFeB granules. Experimental temperature dependences of the ferromagnetic resonance linewidth and shift are in good agreement with theoretical curves obtained within the proposed approach.

利用铁磁共振方法研究了金属绝缘体纳米复合材料（CoFeB）_x（LiNbO ₃）_{1- x}薄膜的温度范围为4–320K。在低温区域，铁磁共振线宽的最大值和负值发现了吸收峰的动态位移，这是离子在磁性杂质上缓慢弛豫的典型机制。观察到的磁弛豫特征可能是由于顺磁性Co和Fe离子分散在电介质LiNbO _{3中引起的}基质并交换耦合至铁磁CoFeB颗粒。铁磁共振线宽和位移的实验温度依赖性与所提出的方法中获得的理论曲线高度吻合。