Figure 3. Comparison of calculated hysteresis loops for Nd₂Fe₁₄B(10 nm)/α-Fe(10 nm) and Nd₂Fe₁₄B(t^h)/interlayer(tⁱ)/α-Fe(t^s) with easy axes perpendicular to the film plane (corresponding to Fig. 1(a,b) respectively).

The blue stars stand for t^h = t^s = 7 nm and tⁱ = 6 nm, the red triangles for t^h = t^s = 8 nm and tⁱ = 4 nm, the black squares and the green circles for t^h = t^s = 10 nm and tⁱ = 0 nm, using OOMMF and 1D analytical respectively.