Abstract The effect of a high magnetic field (25 T) on the D03 to L12 phase transformation in two Fe-Ga alloys with 24 and 27 at.% Ga during isothermal annealing at 475 °C is investigated using neutron diffraction and magnetization measurements techniques. It is proved that annealing in the magnetic field increases the amount of fcc – derived L12 phase in both samples. This effect is stronger in the Fe-27%Ga alloy as compared with the Fe-24%Ga alloy. The reasons for enhancing the D03 to L12 phase transition in the magnetic field are discussed. We suggest that the most significant increase in the transformation rate is related to a decrease in the energy barrier between the phases involved in the transformation process.

中文翻译：

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等温退火过程中强磁场对Fe-24%Ga和Fe-27%Ga相变的影响

摘要 使用中子衍射和磁化测量技术研究了在 475 °C 等温退火期间高磁场 (25 T) 对两种具有 24 和 27 at.% Ga 的 Fe-Ga 合金的 D03 到 L12 相变的影响。事实证明，在磁场中退火会增加两个样品中 fcc 衍生的 L12 相的数量。与 Fe-24%Ga 合金相比，这种效应在 Fe-27%Ga 合金中更强。讨论了在磁场中增强 D03 到 L12 相变的原因。我们认为转化率的最显着增加与转化过程中涉及的相之间的能垒降低有关。