Static magnetization switching in an artificial antiferromagnetic multilayer driven by a voltage-controlled magnetic...

Area of Science:

• Spintronics
• Materials Science
• Electrical Engineering

Background:

• Voltage-controlled magnetic anisotropy (VCMA) offers low-power magnetization switching for spintronic devices.
• Conventional dynamic VCMA switching is sensitive to picosecond pulse width variations, hindering practical applications like magnetoresistive random-access memory (MRAM).

Purpose of the Study:

• To develop a robust, low-power magnetization switching method for spintronic devices.
• To overcome the pulse width sensitivity limitations of dynamic VCMA switching.

Main Methods:

• Exploited an artificial antiferromagnetic trilayer structure with interlayer exchange coupling.
• Applied bipolar voltages to the antiferromagnetic structure to induce static magnetization switching.

Main Results:

• Demonstrated repeatable bidirectional magnetization switching using VCMA.
• Achieved static switching over a wide range of pulse widths, unlike sensitive dynamic switching.
• Overcame the picosecond-level pulse width sensitivity that plagues conventional methods.

Conclusions:

• VCMA-driven static magnetization switching is a viable and robust alternative to dynamic switching.
• This novel method is crucial for developing ultralow-power spintronic devices, including MRAM.
• The technique offers enhanced reliability and wider operational parameters for future memory technologies.