Chiral mesostructured NiFe₂O₄ films with chirality induced spin selectivity

Chiral mesostructured NiFe2O4 films (CMNFFs) were synthesized using l-/d-tyrosine as symmetry-breaking and structure-directing agents through a hydrothermal method. For the first time, chirality induced spin selectivity was directly observed in these ferrimagnetic materials using chirality-dependent magnetic-tip conducting atomic force microscopy (mc-AFM).