 This study investigated the effect of transition metals on the properties of perovskite structures. It was found that these metals can induce a strong spin orbit coupling, leading to a pronounced octahedral distortion. This distortion causes a ferroelectric polarization transition at low temperatures, which can be enhanced by an external magnetic field. Additionally, an electric field can be used to tune the distortion of the octahedra, which in turn feeds back into the spin polarization. As a result, this study has demonstrated a unique approach for achieving magnetoelectric coupling in multi-ferroic materials. This article was authored by Shengqian Liu, Ren Jiehu, Yaobanzhu, and others.