Enhancing Resistive Switching in AlN-Based Memristors Through Oxidative Al₂O₃ Layer Formation: A Study on Preparation...

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Aluminum nitride (AlN) possesses a wide band gap (~6.2 eV), high thermal conductivity, and excellent insulating properties, making it suitable for resistive random access memory (ReRAM).
• Thin film deposition techniques are crucial for fabricating advanced electronic devices like memristors.

Purpose of the Study:

• To investigate the potential of Aluminum nitride (AlN) thin films for resistive random access memory applications.
• To explore the impact of AlN film characteristics on the performance of a Au/Al/AlN/ITO memristor device.

Main Methods:

• Fabrication of AlN thin films on ITO substrates using radio-frequency magnetron sputtering.
• Creation of a sandwich structure memristor (Au/Al/AlN/ITO) by depositing Al and Au top electrodes.
• Systematic variation of AlN film thickness and composition by adjusting deposition time and nitrogen content in the sputtering atmosphere.
• Analysis of electrical resistive switching characteristics, including forming voltage and switching ratio, to understand the switching mechanism.

Main Results:

• The study successfully fabricated AlN thin films and integrated them into a memristor device.
• The effects of AlN film properties on the device's on/off window and voltage characteristics were investigated.
• Optimization of deposition parameters allowed for tuning of AlN film thickness and composition.

Conclusions:

• Aluminum nitride thin films are a viable material for resistive random access memory applications.
• The study provides insights into the resistive switching mechanism in AlN-based memristors, paving the way for improved device design and performance.