Figure 9.

Illustration of D/J mixing on the effective g-values of an Fe^IIIFe^II system. For clarity we have made the following simplifying assumptions. ${\mathcal{D}}_{\text{xx}}^{\text{e}}={\mathcal{D}}_{\text{yy}}^{\text{e}}=-{\mathcal{D}}_{\text{zz}}^{\text{e}}/2;g_{\text{x}}^{\text{B}}=g_{\text{y}}^{\text{B}}=2.15,g_{\text{z}}^{\text{B}}=2.0,g^{\text{A}}=2.00$. The solid lines in black and red were obtained by diagonalization of eq 1. The dashed line for g_x = g_y = g_⊥ was generated by using the perturbation expression of eq 8. The difference between the blue horizontal line at $g_{\perp }=-4g_{\text{x},\text{y}}^{\text{B}}/3=1.80$ and the solid line for g_⊥ is due to D/J mixing.