  Chiral magnets are of fundamental interest and have important technological
ramifications. The origin of chiral magnets lies in the Dzyaloshinskii-Moriya
interaction (DMI), an interaction whose experimental and theoretical
determination is laborious. We derive an expression that identifies the
electric dipole moment as descriptor for the systematic design of chiral
magnetic multilayers. Using density functional theory calculations, we
determine the DMI of (111)-oriented metallic ferromagnetic $Z$/Co/Pt
multilayers of ultrathin films. The non-magnetic layer $Z$ determines the DMI
at the Co-Pt interface. The results validate the electric and magnetic dipole
moments as excellent descriptors. We found a linear relation between the
electric dipole moment of Pt, the Allen electronegativity of $Z$, and the
contribution of Pt to the total DMI.
