研究了Mn替代Fe对多晶Tb0.4Dy0.6Fe1.91合金棒材性能的影响.分析了Tb0.4Dy0.6(Fe1-xMnx)1.91(x=0,0.05,0.10,0.15)多晶棒材的结构、晶格常数、居里温度和磁致伸缩性能,发现Mn替代Fe后,样品仍然为MgCu2型Laves相结构.随着Mn含量从0增加到0.15,样品的晶格常数从7.335A增加到7.347A,居里温度从668K降低到526K.Mn原子的替代通过改变材料的交换相互作用、总磁矩和易磁化方向影响材料的磁致伸缩性能.实验结果显示,Tb0.4Dy0.6(Fe1-xMnx)1.91样品在石=0.10时综合性能最好.
The substitution of Fe by Mn in polycrystalline Tb0.4 Dy0.6 Fe1.91 has been investigated. The structure, lattice constant, Curie temperature, and magnetostriction are examined. The matrix of Tb0.4 Dy0.6 (Fe1-x Mnx ) 1. 91 (x=0,0. 05,0. 10,0. 15) are all MgCu2 type Laves phase structure. With the increase of Mn content from 0 to 0. 15,the lattice parameter increases from 7. 335(A) to 7.347(A) and the Curie temperature decreases from 668K to 526K. The substitution of Mn changes exchange interactions, total magnetic moment and the orientation along the rod axis, so the magnetostriction has been affected. The experimental results show at x=0.10 the performance of the sample Tb0.4-Dy0.6 (Fe1-xMnx)1.91 is the best.
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