Journal
PHYSICAL REVIEW B
Volume 86, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.024429
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Funding
- Department of Energy [DE-FG02-93ER45487]
- U.S. Department of Energy (DOE) [DE-FG02-93ER45487] Funding Source: U.S. Department of Energy (DOE)
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Collapse of a skyrmion due to the discreteness of a crystal lattice in isotropic two-dimensional ferromagnets and antiferromagnets has been studied analytically and by numerical solution of equations of motion for up to 2000 x 2000 classical spins on a square lattice coupled via Heisenberg exchange interaction. Excellent agreement between analytical and numerical results has been achieved. The lifetime of the skyrmion scales with its initial size lambda(0) as (lambda(0)/a)(5) in ferromagnets and as (lambda(0)/a)(2.15) in antiferromagnets with a being the lattice parameter. This makes antiferromagnetic skyrmions significantly shorter lived than ferromagnetic skyrmions.
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