Thermal generation of droplet soliton in chiral magnet

Abstract

Controlled creation of localized magnetic textures beyond conventional $\pi$-skyrmions is an important problem in the field of magnetism. Here by means of spin dynamics simulations, Monte Carlo simulations and harmonic transition state theory we demonstrate that an elementary chiral magnetic soliton with zero topological charge -- the chiral droplet -- can be reliably created by thermal fluctuations in the presence of the tilted magnetic field. The proposed protocol relies on an unusual kinetics combining the effects of the entropic stabilization and low energy barrier for the nucleation of a topologically-trivial state. Following this protocol by varying temperature and the tilt of the external magnetic field one can selectively generate chiral droplets or $\pi$-skyrmions in a single system. The coexistence of two distinct magnetic solitons establishes a basis for a rich magnetization dynamics and opens up the possibility for the construction of more complex magnetic textures such as skyrmion bags and skyrmions with chiral kinks.

5 pages, 4 figures

References in corpus (5)

• Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
• Magnetic skyrmions, chiral kinks and holomorphic functions
• Skyrmion robustness in non-centrosymmetric magnets with axial symmetry: The role of anisotropy and tilted magnetic fields
• Turning chiral skyrmion inside out
• Geometry and Symmetry in Skyrmion Dynamics

Cited by in corpus (6)

• Tailed skyrmions -- an obscure branch of magnetic solitons
• Homotopy transitions and 3D magnetic solitons
• Stability and Nucleation of Dipole Strings in Uniaxial Chiral Magnets
• Symmetry-Governed Dynamics of Magnetic Skyrmions Under Field Pulses
• Co-existing magnetization reversal mechanisms in shakti spin ice systems
• Skyrmionic Schrödinger cat states in monoaxial chiral magnets