Figure 1: Schematic illustration of the mechanism for magnetodielectric coupling in partially antisite-disordered ${\text{La}}_2{\text{NiMnO}}_6$. Green: $\text{La}$; Blue: $\text{Ni}$; Red: $\text{Mn}$; Gray: Bridging $\text{O}$. The gray arrows on the O ions represent the magnetic interactions between neighboring magnetic ions. Charge transfer between the ${\text{Ni}}^{2+}$ and ${\text{Mn}}^{4+}$ produces a large dipole moment in the unit cell, which is suppressed by the ferromagnetic spin alignment in an applied magnetic field.