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本文研究外加磁场情况下，Ｓｍ＿（０．８８）Ｄｙ＿（０．１２）Ｆｅ＿２合金的微观结构，确定了低磁场（２．５ＫＯｅ～３．０ＫＯｅ）下，该合金中（Ｓｍ，Ｄｙ）Ｆｅ＿２相由立方晶转变为正方晶系，原子发生了位移，初步分析了微观晶格畸变与宏观磁致伸缩应变的关系。
In this paper, the microstructure of Sm_ (0.88) Dy_ (0.12) Fe_ (2) alloy under the condition of applied magnetic field was studied. It was found that the (Sm, Dy) From cubic to tetragonal system, the atoms are displaced. The relationship between the microscopic lattice distortion and the macro-magnetostrictive strain is analyzed preliminarily.