Abstract
Magnetic skyrmions emerge when the energy of ferromagnetic exchange interaction promoting parallel alignment of spins enters in competition with energies favoring non-collinear alignment of spins such as Dzyaloshinskii-Moriya interaction(DMI),long-rang dipole-dipole interaction(DDI),or higher-order exchange interactions.We perform an unbiased Monte Carlo simu-lation to study the DMI-based skyrmion nucleation and stabilization on the surface of magnetic nanotubular monolayer controlled by tuning constants of DDI(g)and next-nearest-neighbor antiferromagnetic exchange interac-tion(j')with appropriate balance.Without g and j',the loosely distributed skyrmions initially nucleate on the surface of nanotube approaching to the magnetic field(h)direction with increasing h in the intermediate range.Then,the skyrmion size,shape,density,distribution and crystal structure,as well as its driven field range,are tai-lored by g and j'.This work demonstrates the skyrmion nucleation mechanisms in three-dimensional magnetic nanostructures with curvature effect and multiple interactions,serving as a benchmark for a guide to exper-imentalists for preparation of samples in magnetic sky-rmion states.
基金项目
Key Program of National Natural Science Foundation of China-Regional Innovation and Development Joint Fund(U22A20117)
Natural Science Foundation of Liaoning Province(2022-MS-108)
Fundamental Research Funds for Central Universities(N2205015)
NETL
NSTL
万方数据