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本文研究了Gd(Co_1-xNix)_5赝二元系化合物的结构,点阵常数,居里温度和磁化强度随成分的变化。金相分析表明当x≤0.5时,铸态试样含有Gd_2(Co,Ni)_7相,随着Ni量增加,Gd_2(Co,Ni),相逐渐减少,当X=0.6时完全消失。退火试样都是固溶体,具有CaCu_5型六角结构。Gd(Co_1-xNix)_5的点阵常数与成份的关系不服从Vegard定则。居里温度与成份关系曲线在X>0.6时出现明显的转折。当X≤0.6时,在磁化强度一温度曲线上出现最小值(补偿点),当X=0.8时补偿点消失。应用目前公认的亚铁磁性偶合原理,对这些结果进行了解释。
In this paper, the structure, lattice constant, Curie temperature and magnetization of Gd (Co_1-xNix) _5 pseudomorphic compounds have been studied. Metallographic analysis shows that when x≤0.5, the as-cast sample contains Gd_2 (Co, Ni) _7 phase. With the increase of Ni content, the phase of Gd_2 (Co, Ni) gradually decreases and disappears completely when X = 0.6. Annealed samples are solid solution, with hexagonal CaCu_5 structure. The lattice constants of Gd (Co_1-xNix) _5 are not obeyed by Vegard’s rule. Curie temperature and the composition of the curve in the X> 0.6 when there is a clear turning point. When X≤0.6, the minimum value (compensation point) appears on the magnetization-temperature curve. When X = 0.8, the compensation point disappears. These results are explained using the currently accepted ferrimagnetic coupling principle.