Topological defects and magnetization processes for the triangular lattice of ising particles with an antiferromagnetic interaction

Иванов, Б. А.; Kireev, V. E.

doi:10.1134/s0021364009240035

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…For our system of mesoscopic magnetic particles with a dipole interaction, the effect of a magnetic field, instead of thermal effects, should be significant. The topological defect line with non-zero magnetization and having zero energy in the nearest-neighbor approximation was recently found [57]. This defect coincides with that observed in our numerical simulations, compare figure 4 and figures 3(a)-3(d) above.…”

Section: Instability Of Afm State Through the Creation Of Topological...supporting

confidence: 90%

“…The resulting magnetic structure can be interpreted as an antiferromagnetic domain structure in a system with a zigzag line as a domain wall. Such topological linear defects were described for a two-sublattice antiferromagnetic state with an interaction of a few neighboring moments [57]. For the region of small fields, an increase of magnetic field leads to an increase of the density of topological linear defects, see figures 3(a)-3(c).…”

Section: Monte-carlo Analysis For Intermediate Field Valuesmentioning

confidence: 95%

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Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

Khymyn¹,

Kireev²,

Ivanov³

2014

Condens. Matter Phys.

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The regular array of magnetic particles (magnetic dots) of the form of a two-dimensional triangular lattice in the presence of external magnetic field demonstrates complicated magnetic structures. The magnetic symmetry of the ground state for such a system is lower than that for the underlying lattice. Long range dipole-dipole interaction leads to a specific antiferromagnetic order in small fields, whereas a set of linear topological defects appears with the growth of the magnetic field. Self-organization of such defects determines the magnetization process for a system within a wide range of external magnetic fields.

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Section: Instability Of Afm State Through the Creation Of Topological...supporting

confidence: 90%

Section: Monte-carlo Analysis For Intermediate Field Valuesmentioning

confidence: 95%

Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

Khymyn¹,

Kireev²,

Ivanov³

2014

Condens. Matter Phys.

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“…For the lattices of particles with a high perpendicular anisotropy, the ground state corresponds to various types of two-sublattice antiferromagnetic order, particularly, a chessboard structure is realized for a square lattice, 29 and a layered one for a triangular lattice. 37 For finite fragments of such lattices these structures vary insignificantly being compared to the infinite case. In the case of systems with an in-plane anisotropy, the role of the boundaries is more essential.…”

Section: Introductionmentioning

confidence: 99%

Vortex ground state for small arrays of magnetic particles with dipole coupling

et al. 2013

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We show that a magnetic vortex is the ground state of an array of magnetic particles shaped as a hexagonal fragment of a triangular lattice, even for an small number of particles in the array N ≤ 100. The vortex core appears and the symmetry of the vortex state changes with the increase of the intrinsic magnetic anisotropy of the particle β; the further increase of β leads to the destruction of the vortex state. Such vortices can be present in arrays as small in size as dozen of nanometers.

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“…Such a scenario, magnetization through the creation of a set of topological linear defects, was described for a twosublattice antiferromagnetic state with an interaction of a few neighboring moments. 37 For the region of small fields, the increasing the magnetic field leads to an increase of the density of the topological linear defects, see Figs. 3(b) and Fig.…”

Section: Transition Region Topological Mechanismmentioning

confidence: 98%

“…In contrast to a square lattice, the transition between these states is governed by a novel mechanism involving creation of linear topological defects with non-zero magnetization. 37 II. MODEL DESCRIPTION.…”

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confidence: 99%

Ground states and magnetization process for an triangular lattice array of magnetic dots with perpendicular anisotropy

Kireev¹,

Khymyn²,

Иванов³

et al. 2012

Preprint

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We analyzed the ground state of the array of magnetic particles (magnetic dots) which form a two-dimensional triangular lattice, and magnetic moment of which is perpendicular to the plane of the lattice, in the presence of external magnetic field. In the small fields long range dipole-dipole interaction leads to the specific antiferromagnetic order, where two out of six nearest neighbors of the particle have the same direction of magnetization moment and four -the opposite one. It is shown that magnetization process in such array of particles as opposed to the rectangular lattices results from the formation of the magnetized topological defects (dislocations) in the shape of the domain walls.

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Topological defects and magnetization processes for the triangular lattice of ising particles with an antiferromagnetic interaction

Cited by 5 publications

References 6 publications

Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

Vortex ground state for small arrays of magnetic particles with dipole coupling

Ground states and magnetization process for an triangular lattice array of magnetic dots with perpendicular anisotropy

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