Customizing Room‐Temperature Perovskite Ferroelectrics  toward the Multichannel Domain Manipulation

(n = 2-7), of which the Curie temperatures are modulated in a wide temperature range (ΔT = 74 K) by tailoring chain length of organic spacers. Strikingly, the n = 7 member is a room-temperature ferroelectric with bistable characteristics, thus endowing the manipulation of domains via four channels (i.e., thermal, stress, light, and electric fields). Such a non-volatile memory behavior of the stress-switching domain is unprecedented in hybrid perovskite ferroelectrics. This manipulation of domains reveals the unique bistability of its ferroelectric orders, which sheds light on the future advance of customizing electric-ordered materials toward smart device applications.