Abstract
Abstract Ferromagnetic MPB in the TbxDy1−xCo2 system was confirmed via both experimental and theoretical research, which demonstrates the simultaneous structural change with ferromagnetic phase transition. According to the ferromagnetic MPB theory, a phenomenological thermodynamic model of TbxDy1−xCo2 at Dy-rich side was constructed. The thermodynamic model predicts the behavior of DyCo2, which is consistent with the experimental value. The phenomenological thermodynamic model based on ferromagnetic MPB could be employed to make a quantitative analysis of magnetostrictive or magnetocaloric materials.
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