Phase equilibria in the Fe-La-Si ternary system

► Fe-La-Si isothermal phase diagrams at 1173, 1373 and 1573 K were determined. ► Vertical section phase diagram in La(Fe1−xSix)13 (0.07≦x≦0.40) was determined. ► Two-phase region of the cubic and tetragonal La(Fe1−xSix)13 phases was determined. ► Guideline for fabricating the La(Fe1−xSix)13 magnetic refrigerant was established.