Influence of magnetic dipole and magnetoelastic interactions on the phase states of 2D non-Heisenberg ferromagnetic with complex exchange interactions

Сверхтвердая Магнитная Фаза В Двумерном Изингоподобном Антиферромагнетике С Большой Одноионной Анизотропией

“…К сожалению, нам не удалось найти работ, посвя-щенных исследованию сверхтвердой магнитной фазы в двумерных системах. Очевидно, двумерность системы подразумевает существенное влияние магнитодиполь-ного взаимодействия, которое может усиливать лег-коплоскостную анизотропию и приводить к реализа-ции пространственно-неоднородных состояний, напри-мер плоскопараллельных доменов [40][41][42] и вихревых структур [43][44][45]. При этом данные состояния могут реализовываться не только в ферромагнетиках, но также и в антиферромагнетиках [44][45][46][47].…”

Dynamic and static properties of rigidly fixed ultrathin ferromagnetic films with S = 1 and competing anisotropies

“…19,22,23 The inclusion of magnetic dipole interactions can lead to a spatially inhomogeneous distribution of the magnetization in a sample, i.e., to the appearance of a spatially inhomogeneous state-a domain structure. [24][25][26][27][28] The systems described above have been studied fairly well for the case of small single-ion anisotropy constants. 29,30 However, there is a large class of magnetically ordered systems in which the single-ion anisotropy energy is quite large.…”

“…We assume that the film has a thickness equal to one atomic layer, i.e., is a 2D object, and has a flat, square lattice. The two-dimensionality of the system means that magnetic dipole interactions have a significant effect which can lead to enhancement of the easy-plane anisotropy and the realization of spatially inhomogeneous phase states, such as planeparallel domains [24][25][26] and helical structures; 27 these states are possible in ferromagnets, but also in antiferromagnets. 48,49 The assumption of a two-dimensional system also means that the material parameters of the system, such as the exchange integral and the single-ion anisotropy constants, cannot be separated into "bulk" and "surface" parameters (a distinction that is important for films with finite thicknesses).…”

Effect of tilted anisotropy on spin states of strongly anisotropic 2D film

“…The tilted anisotropy energy is the weakest compared to other types of interaction (we consider here weakly disoriented magnetic structures netodipole interaction, which can lead to the forma tion of spatially inhomogeneous phase states [16][17][18][19]. The spin of the magnetic ion will be set as unity.…”

“…1. ψ = 0. In this case, the low frequency magnon spectrum in the long wavelength limit has the form (19) where α = , R 0 being the range of the exchange interaction. First of all, we must pay attention in expression (19) to the term of the form Ω 0 kcos2ϕ cos 2ϕ, whose sign is determined by angle ϕ.…”