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采用定向凝固的方法制备出棒状〈110〉轴向取向多晶Fe83Ga17样品,Fe83Ga17合金样品经过淬火处理后,饱和磁致伸缩应变λs可以达到2.42×10-4。实验发现样品的磁致伸缩应变与合金中的短程序密切相关。淬火处理后样品的磁性Fe原子周围的原子占位发生了改变,合金部分有序。文中采用“原子对模型”(pairmodel),从能量最小原理出发,分析讨论了Fe Ga合金中原子对间的相互作用与磁致伸缩应变的关系。
The rod-shaped <110> polycrystalline Fe83Ga17 samples with axial orientation were prepared by directional solidification. After quenching the Fe83Ga17 alloy samples, the saturation magnetostriction strain λs could reach 2.42 × 10-4. The experiment found that the magnetostrictive strain of the sample is closely related to the short procedure in the alloy. After quenching the magnetic Fe atoms around the samples occupy a placeholder for the change, the alloy part of the order. Based on the principle of minimum energy, the “atom pair model” (pairmodel) is used in this paper to analyze and discuss the relationship between the atomic pair interactions and the magnetostrictive strain in Fe-Ga alloys.