Table 1. Calculated values of anisotropy energy, K₁, and easy magnetization direction, for various substitutions into the Fe₃Sn phase based on virtual crystal calculations. A negative value for K₁ indicates an easy magnetization axis along c.

Dopant and Concentration	Predicted Anisotropy	K1(MJ/m3)
Pure Fe3Sn	Planar	1.59
25% Mn	Planar	0.78
25% Co	Planar	0.74
25% Sb	Uniaxial	−0.5
25%Co + 25%Sb	Uniaxial	−0.32
25%Mn + 25%Sb	Planar	1.55