Fig. 1: Atomic structure of unit cells in iron garnet films.

a The atomic model of garnet in the unit cell. b The projected atomic arrangement along the [001] zone axis. c In-depth view of the unit cell along the [001] axis. Atomic columns labeled as a and c are occupied by dodecahedral and tetrahedral sites, while the one labeled as b is occupied only by octahedral sites. d, e The STEM-HAADF images of films in defect-free region are obtained along the [111] (d) and [001] (e) zone axes, where insets in an enlarged view extracted from HAADF images are consistently overlapped with the atomic model. On the right sides, the selected area of the electron diffraction patterns in the prepared film is acquired along corresponding zone axes.