Enhanced performance of flexible BiFeO₃ ferroelectric memory with Mica substrate via SrTiO₃ buffer layer

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Bismuth ferrite (BiFeO3) possesses unique ferroelectric and magnetic properties, making it attractive for flexible wearable devices.
• Integrating high-quality BiFeO3 films onto flexible substrates is a significant technical challenge.

Purpose of the Study:

• To fabricate high-quality BiFeO3 films on flexible substrates.
• To investigate the fatigue characteristics of BiFeO3 films on flexible substrates.
• To develop flexible non-volatile memory devices using BiFeO3 films.

Main Methods:

• Pulsed laser deposition was used to fabricate BiFeO3 films on mica substrates.
• Fatigue characteristics were tested after 10^8 bipolar switching cycles.
• Mechanical flexibility was assessed at a bending radius of 3.5 mm.

Main Results:

• High-quality BiFeO3 films were successfully fabricated on flexible mica substrates.
• The BiFeO3 films exhibited superior fatigue resistance, with only 0.28% polarization degradation after 10^8 cycles.
• The flexible memory devices demonstrated mechanical flexibility and retained ferroelectric properties upon bending.

Conclusions:

• Flexible BiFeO3 films show exceptional fatigue resistance and mechanical flexibility.
• These findings highlight the potential of BiFeO3 for wearable electronics and flexible memory applications.
• The study provides insights for developing high-performance flexible ferroelectric materials.