Non-volatile magnon transport in a single domain multiferroic

Area of Science:

• Spintronics and Magnonics
• Multiferroic Materials Science

Background:

• Antiferromagnets are key for low-energy information transfer in magnonics.
• Understanding spin transport in multiferroics like BiFeO3 is crucial but complex due to coupled orders.
• Crystalline orientation effects on magnon transport are largely unexplored.

Purpose of the Study:

• To engineer a single-domain multiferroic with a controllable spin cycloid.
• To investigate the fundamental origins of magnon transport anisotropy in such systems.
• To establish a pathway for understanding spin transport in single-domain multiferroics.

Main Methods:

• Lanthanum (La) substitution in BiFeO3 to achieve a single ferroelectric domain.
• Engineering a stable, single-variant spin cycloid.
• Electric field control of the spin cycloid.
• Characterization of spin transport anisotropy.

Main Results:

• Successful creation of a single-domain BiFeO3 via La substitution.
• Demonstration of an electric-field-controllable, stable spin cycloid.
• Observation of strong magnon transport anisotropy linked to the spin cycloid lattice.

Conclusions:

• La substitution provides a method to engineer single-domain multiferroics.
• The spin cycloid lattice dictates magnon transport anisotropy.
• This work offers fundamental insights into spin transport in single-domain multiferroics for advanced computing.