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系统研究了室温下Tb0.3Dy0.7(Fe0.9T0.1)1.95(T=Mn,Fe,Co,B,Al,Ga)合金中ⅢA族金属和过渡金属元素T替代Fe对晶体结构、磁致伸缩、内禀磁致伸缩、自旋重取向的影响.结果发现,不同金属T替代Fe,Tb0.3Dy0.7(Fe0.9T0.1)1.95合金具有相同的MgCu2型立方Laves相结构.ⅢA族金属B,Al,Ga替代使磁致伸缩λs下降幅度较大,同时发现Al,Ga替代使磁致伸缩容易饱和,表明Al,Ga替代可降低Tb0.3Dy0.7(Fe1?xTx)1.95合金的磁晶各向异性,而过渡金属Mn,Co替代Fe使Tb0.3Dy0.7(Fe1?xTx)1.95合金磁致伸缩λs下降幅度较小;不同替代金属元素,对内禀磁致伸缩λ111有不同的影响.M?ssbauer效应表明,Al,Ga替代使Tb0.3Dy0.7-(Fe0.9T0.1)1.95合金的易磁化方向在{110}面逐渐偏离了立方晶体的主对称轴,即自旋重取向,B,Mn,Co替代未使易磁化轴发生明显转动.
In this paper, the crystal structures of Group IIIA metal and transition metal T in Tb0.3Dy0.7 (Fe0.9T0.1) 1.95 (T = Mn, Fe, Co, B, Al, Ga) Induced magnetostriction and spin reorientation.The results show that the substitution of different metals T for Fe and Tb0.3Dy0.7 (Fe0.9T0.1) 1.95 alloys has the same MgCu2 cubic Laves phase structure.ⅢA The substitution of metal B, Al and Ga made the decrease of magnetostriction λs larger, and also found that the substitution of Al and Ga made the magnetostriction easy to be saturated, which indicated that substitution of Al and Ga decreased the Tb0.3Dy0.7 (Fe1? XTx) 1.95 alloy Of the magnetocrystalline anisotropy, and the replacement of transition metals Mn, Co Fe Tb0.3Dy0.7 (Fe1? XTx) 1.95 alloy magnetostriction λs smaller decline; different alternative metal elements, the intrinsic magnetostriction λ111 have The M? Ssbauer effect shows that the easy magnetization direction of Tb0.3Dy0.7- (Fe0.9T0.1) 1.95 alloy gradually deviates from the main symmetry axis of the cubic crystal in the {110} plane by Al and Ga substitutions, that is, Spin reorientation, B, Mn, Co substitution did not make the easy magnetization axis significant rotation.