Electric Current Control of Helimagnetic Chirality from a Multidomain State in the Helimagnet MnAu${}_2$

Abstract

In this paper, we study the domain wall dynamics under electric current in the helimagnet MnAu${}_2$. We have found that the threshold electric current of the transition from a multidomain state to a single-chiral domain state in a magnetic field is much lower than that of chirality reversal from a single-chiral domain within certain ranges of temperature and magnetic field. The chirality after the transition depends on whether the magnetic field and electric current were parallel or antiparallel. Numerical calculations based on the Landau-Lifshitz-Gilbert equation reproduced the experimental observations. These results indicate that the domain walls are highly mobile in the helimagnet.

12 pages, 13 figures

References in corpus (12)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Microscopic approach to current-driven domain wall dynamics
• Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn${}_{\text{3}}$Sn
• Electrical control of magnetism by electric field and current-induced torques
• Current-polarity dependent manipulation of antiferromagnetic domains
• Nanoscale mechanics of antiferromagnetic domain walls
• Chiral domain walls of Mn${}_3$Sn and their memory
• Topological domain walls in helimagnets
• Domain walls in helical magnets
• Current-driven writing process in antiferromagnetic Mn2Au for memory applications
• Current-induced sliding motion in a helimagnet MnAu${}_2$