Magnon confinement in epitaxial antiferromagnetic oxide heterostructures

Area of Science:

• Condensed Matter Physics
• Materials Science
• Spintronics

Background:

• Magnons, the quanta of spin waves, are crucial for spintronics, especially for non-volatile logic-in-memory devices.
• Controlling magnons in conventional antiferromagnets and applying them practically remains a significant challenge.

Purpose of the Study:

• To demonstrate efficient magnon transport in an all-antiferromagnetic system.
• To explore electrical control of magnons for energy-efficient computation.
• To enable magnetoelectric memory and logic functionalities.

Main Methods:

• Utilized a LaFeO3/BiFeO3/LaFeO3 all-antiferromagnetic system.
• Leveraged spin-orbit-driven spin-charge transduction.
• Investigated magnon confinement in ultrathin antiferromagnets.

Main Results:

• Achieved highly efficient and electrically controlled magnon transport.
• Demonstrated magnon confinement in ultrathin antiferromagnets.
• Enhanced output voltage from magnon transport by several orders of magnitude.

Conclusions:

• The demonstrated material architecture enables magnon confinement and significant voltage enhancement.
• This provides a pathway for magnetoelectric memory and logic functionalities.
• Non-volatile output voltage facilitates ultralow-power logic-in-memory processing via reconfigurable magnetoelectric channels.