In order to understand the intrinsic properties of high abundance permanent magnet materials, effects of Co element on the structure, magnetic, and microwave absorption properties of La_12.5(Fe_1-xCo_x)_81.3B_6.2 alloys have been investigated with x = 0, 0.1, 0.2, 0.3. The X-ray diffraction results revealed that compounds of La_12.5(Fe_1-xCo_x)_81.3B_6.2 crystallized the Nd₂Fe₁₄B-type structure with the space group P42/mnm. The saturation magnetization of the powders increases with the Co content increasing, 97.7 emu/g for x = 0.3. The minimum absorption peak value of La_12.5(Fe_1-xCo_x)_81.3B_6.2 alloy reaches about − 18.69 dB at 10.56 GHz with the matching thickness of 2.5 mm.

中文翻译：

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钴元素对La-Fe-B合金的结构，磁性和微波吸收性能的影响

为了理解高丰度永磁材料的固有性能，研究了Co元素对x = 0的La _12.5（Fe _1-x Co _x）_81.3 B _6.2合金的结构，磁性和微波吸收性能的影响。，0.1、0.2、0.3。X射线衍射结果表明，La _12.5（Fe _1-x Co _x）_81.3 B _6.2化合物使Nd ₂ Fe ₁₄结晶。B型结构的空间群为P42 / mnm。粉末的饱和磁化强度随着Co含量的增加而增加，x = 0.3时为97.7 emu / g 。La _12.5（Fe _1-x Co _x）_81.3 B _6.2合金的最小吸收峰值在10.56 GHz处达到约− 18.69 dB，匹配厚度为2.5 mm。