Customizing Room-Temperature Perovskite Ferroelectrics  toward the Multichannel Domain Manipulation

Area of Science:

• Materials Science
• Solid State Physics
• Nanotechnology

Background:

• Ferroelectric materials are crucial for electronic devices, but controlling their domain structure with multiple stimuli remains a challenge.
• Understanding the bistability of ferroelectric domains under various physical conditions is key to developing advanced functionalities.

Purpose of the Study:

• To synthesize and characterize a series of hybrid perovskite ferroelectrics with tunable properties.
• To investigate the multichannel control of ferroelectric domains in these materials, particularly focusing on bistability.

Main Methods:

• Custom synthesis of (CnH2n+1NH3)2(CH3NH3)2Pb3Br10 perovskite ferroelectrics with varying organic spacer chain lengths (n=2-7).
• Modulation of Curie temperatures by tailoring the organic spacer chain length.
• Investigation of domain manipulation via thermal, stress, light, and electric field stimuli.

Main Results:

• A wide modulation of Curie temperatures (ΔT = 74 K) was achieved by adjusting the organic spacer chain length.
• The n=7 member demonstrated room-temperature ferroelectricity with bistable characteristics.
• Unprecedented non-volatile memory behavior was observed through stress-switching of domains in hybrid perovskite ferroelectrics.

Conclusions:

• The synthesized hybrid perovskites offer tunable ferroelectric properties and enable multichannel domain manipulation.
• The n=7 material's unique bistability and room-temperature ferroelectricity pave the way for novel smart device applications.
• This work advances the understanding of electric-ordered materials and their potential in next-generation electronics.