Steady configurations of a square dipole lattice in an external field

Klymenko, V. E.; Kukhtin, V.; Оgenko, V. M.; Rosenbaum, V. M.

doi:10.1016/0375-9601(90)90123-6

Cited by 6 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The long-range order in regular lattices of magnetic dipoles has already been the subject of extensive theoretical inquiry. Most theoretical work on supermagnetism, more specifically on dipolar-coupled magnetic lattices, treat regular arrays with a well-defined lattice symmetry, [11][12][13][14] where the individual dipolar-coupled nanomagnets are assumed to be monodomain. 15 In the present study, we explore supermagnetism in arrays of 5 nm thick circular nanomagnets using the micromagnetic simulation software MuMax3.…”

mentioning

confidence: 99%

Tailoring the magnetic order in a supermagnetic metamaterial

et al. 2017

View full text Add to dashboard Cite

The emergent magnetism in close-packed assemblies of interacting superparamagnetic particles is commonly referred to as supermagnetism. The magnetic characteristics of such systems are determined by the dipolar coupling between the nanomagnets, rather than the exchange interaction responsible for ferro- and antiferromagnetism in continuous material. The dipolar coupling facilitates tuning of the magnetism, which renders supermagnetic ensembles suitable model systems for exploration of new physics. In this work, we discuss micromagnetic simulations of regular arrays of thin film nanomagnets, with magnetic material parameters typical of the ferromagnetic oxide La0.7Sr0.3MnO3. The ground state supermagnetic order in these systems is primarily determined by the lattice configuration, in that a square lattice results in antiferromagnetic order, whereas a triangular lattice shows ferromagnetic order. We found that a square lattice of circular nanomagnets may be switched from superferromagnetic to superantiferromagnetic order by a small external field applied in the appropriate direction.

show abstract

mentioning

confidence: 99%

Tailoring the magnetic order in a supermagnetic metamaterial

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This third domain will expand with increasing field strength towards both lower and larger values of θ. We can explain this behavior in the context of dipoles in square (non-deformed) Bravais lattices (with a global γ = 1), where the external field breaks the GS degeneracy and orients the dipoles along the field lines -in an AFE (FE) configuration for weak (strong) fields [45]. In other words: in a lattice with γ = 1 the dipoles do not have a preferred alignment direction (w.r.t.…”

Section: General Setup and Methodologymentioning

confidence: 97%

Geometry induced domain-walls of dipole lattices on curved structures

Siemens¹,

Schmelcher²

2023

Preprint

View full text Add to dashboard Cite

“…This third domain will expand with increasing field strength towards both lower and larger values of θ. We can explain this behavior in the context of dipoles in square (non-deformed) Bravais lattices (with a global γ = 1): In such square lattices, the external field breaks the GS degeneracy and orients the dipoles along the field lines-in an AFE (FE) configuration for weak (strong) fields [53]. In other words: in a lattice with γ = 1 the dipoles do not have a preferred alignment direction (w.r.t.…”

Section: Dws In Deformed Latticesmentioning

confidence: 99%

Geometry induced domain-walls of dipole lattices on curved structures

Siemens,

Schmelcher

2023

J. Phys. A: Math. Theor.

View full text Add to dashboard Cite

We investigate the ground state (GS) properties of rectangular dipole lattices on curved surfaces. The curved geometry can ‘distort’ the lattice and lead to dipole equilibrium configurations that strongly depend on the local geometry of the surface. We find that the system’s GS can exhibit domain-walls separating domains with different dipole configurations. Furthermore, we show how, regardless of the surface geometry, the domain-walls (DWs) locate along the lattice sites for which the (Euclidean) distances to nearest and next-nearest neighbors are equal. We analyze the response of the DWs to an external electric field and observe displacements and splittings thereof below and above a critical electric field, respectively. We further show that the DW acts as a boundary that traps low-energy excitations within a domain.

show abstract

Steady configurations of a square dipole lattice in an external field

Cited by 6 publications

References 4 publications

Tailoring the magnetic order in a supermagnetic metamaterial

Tailoring the magnetic order in a supermagnetic metamaterial

Geometry induced domain-walls of dipole lattices on curved structures

Geometry induced domain-walls of dipole lattices on curved structures

Contact Info

Product

Resources

About