Fe−Ga alloys (Galfenols) are of interest due to their pronounced magnetostriction, whereby the mechanistic understanding is limited. By means of powder X-ray and neutron diffraction it is shown that as-cast Fe-38.4 at%Ga alloy consists of Fe₁₃Ga₉ intermetallic with a monoclinic Ni₂In/NiAs-related structure, which coexists with bcc solid solution. By means of electron backscatter diffraction it is shown that the Fe₁₃Ga₉ intermetallic develops with two different but closely related orientation relationships with respect to the matrix, which can be derived by the relation between the atomic structures of Fe₁₃Ga₉ and the matrix. First principles calculations reveal that Fe₁₃Ga₉ should be stable at 0 K and that this phase may also expected to develop in alloys for lower Ga contents and may have to be considered upon interpreting macroscopically observed magnetostriction.

由于Fe-Ga合金（Galfenols）的显着磁致伸缩性，因此引起了人们的关注，从而限制了机械理解。通过粉末X射线和中子衍射表明，铸态的Fe-38.4at％Ga合金由具有单斜Ni ₂ In / NiAs相关结构的Fe ₁₃ Ga ₉金属间化合物组成，并与bcc固溶体共存。通过电子背散射衍射表明，Fe ₁₃ Ga ₉金属间化合物相对于基体具有两种不同但紧密相关的取向关系，这可由Fe ₁₃ Ga ₉的原子结构之间的关系得出。和矩阵。第一性原理计算表明，Fe ₁₃ Ga ₉应该在0 K处稳定，并且该相还可能在较低Ga含量的合金中发展，并且在解释宏观观察到的磁致伸缩时可能必须考虑该相。