Chiral Mesostructure‐Induced Ferroelectricity and Photoelectric Chiral Anisotropy of MnWO4

Creating ferroelectricity in centrosymmetric and paramagnetic materials through nanostructures presents a challenge in materials science due to their high symmetry and paired spins. Herein, the induction of chirality‐induced ferroelectricity and photoelectric chiral anisotropy in chiral mesostructured MnWO 4 films (CMWFs) resulting from spin chiral anisotropy in chiral mesostructures is reported. The CMWFs, prepared via a hydrothermal route induced by chiral molecules, consists of densely packed MnWO 4 nanoparticle crystals exhibiting long‐range ordered helical lattice distortion grown perpendicularly along the 010 axis on the substrates. These CMWFs exhibit ferroelectric properties with a Curie temperature of ≈60 °C and photoelectric chiral anisotropy with an anisotropy factor of ≈0.5. The findings pave the way for ferroelectricity through long‐range spin current via chirality.