A slush-like polar structure for high energy storage performance in a Sr0.7Bi0.2TiO3 lead-free relaxor ferroelectric thin film

A slush-like polar structure with 2–4 nm multi-domains and low-angle domain walls, as the origin of the high energy storage performance in Sr 0.7 Bi 0.2 TiO 3 thin films, is directly visualized and quantitively described.