Domain walls in antiferromagnets: The effect of Dzyaloshinskii–Moriya interactions

Conzelmann, Teo; Selzer, Severin; Nowak, Ulrich

doi:10.1063/5.0009409

Cited by 10 publications

(6 citation statements)

References 49 publications

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“…Our analysis of the static wall profile dependence on DMI agrees with results in Ref. [35]. We summarize the key details in subsequent paragraphs.…”

Section: The Modelsupporting

confidence: 86%

“…The first term on the right is the nearest-neighbour exchange interaction between spins. The second and third terms are the easy and intermediate axis anisotropies in the z− and x− directions, respectively [35] with constants K z K x . The last term is the antisymmetric interfacial DMI whose alternating sign prevents a spiral spin state.…”

Section: The Modelmentioning

confidence: 99%

“…where A = J/2 is the exchange constant, D x and D y are the x and y components of the DMI, respectively (See Appendix for the derivation of the DMI). The domain wall static profile is obtained using the standard methods [24,35,[38][39][40]. The domain wall tilt angle is defined as φ with respect to the x-z plane and assumed to be constant.…”

Section: The Modelmentioning

confidence: 99%

See 2 more Smart Citations

Collective dynamics of domain walls: an antiferromagnetic spin texture in an optical cavity

Iyaro,

Proskurin,

Stamps

2021

Preprint

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Spin canting and complex spin textures in antiferromagnetic materials can often be described in terms of Dzyaloshinskii-Moriya interactions (DMI). Values for DMI parameters are not easily measurable directly, and often inferred from other quantities. In this work, we examine how domain wall dynamics in an antiferromagnetic optomagnonic system can display unique features directly related to the existence of DMI. Our results indicate that the presence of DMI enables spin interactions with cavity photons in a geometry which otherwise allows no magneto-optical coupling, and on the other hand modulates frequencies in a geometry where coupling is already realized in the absence of DMI. This result may be used to measure the DMI constant in optomagnonic experiments by comparing resonances obtained with different polarisations of the exciting field.

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“…Our analysis of the static wall profile dependence on DMI agrees with results in Ref. [35]. We summarize the key details in subsequent paragraphs.…”

Section: The Modelsupporting

confidence: 86%

Section: The Modelmentioning

confidence: 99%

See 1 more Smart Citation

Collective dynamics of domain walls: an antiferromagnetic spin texture in an optical cavity

Iyaro,

Proskurin,

Stamps

2021

Preprint

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“…[1,2] and references therein). In particular, considerable efforts have been made to understand and manipulate the magnetic domain structure [3], spin-wave scattering at the domain walls [4] and domain wall motion [5,6]. Understanding the domain wall structure and dynamics is not only relevant from an application point of view, but also has profound effects on the macroscopic thermodynamics and transport properties of strongly correlated electron systems [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Magnetostriction and magnetostructural domains in CoTiO$_3$

Dey,

Hoffmann,

Klingeler

2021

Preprint

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We report the magnetostrictive length changes of CoTiO3 studied by means of high-resolution dilatometry in magnetic fields (B) up to 15 T. In the long-range antiferromagnetically ordered phase below TN = 38 K, the easy-plane type spin structure undergoes a spin-reorientation transition in the ab plane in magnetic fields B||ab ≈ 2 T. We observe pronounced length changes driven by external magnetic field in this field region indicating significant magnetoelastic coupling in CoTiO3. Specifically, we observe anisotropic deformation of the lattice for fields applied in the ab plane. While, for B 2 T, in-plane magnetostriction shows that the lattice expands (contracts) parallel (perpendicular) to the field direction, the opposite behaviour appear at higher fields. Furthermore, there are remarkable effects of slight changes in the applied uniaxial pressure on the magnetostrictive response of CoTiO3 persisting to temperatures well above TN. The data evidence the presence of magnetic domains below TN as well as of structural ones in CoTiO3. The presence of magnetic domains in the spin ordered phase is further evidenced by an additional 3-fold magnetic anisotropy appearing below TN. We discuss the effects of rotational magnetic domains on isothermal magnetization and magnetostriction and interpret our results on the basis of a multi-domain phenomenological model.

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“…This chiral interaction is responsible for many exotic states and the stabilization of topological solitons in both ferromagnetic (FM) and antiferromagnetic (AFM) systems, such as helimagnets [1], chiral domain walls [2 and 3], skyrmions [4][5][6][7], hopfions [8], topological magnons [9], and nonreciprocal dynamics of magnetic excitations or magnons [10 and 11]. In AFM materials, DM interactions also break the degeneracy of two magnon modes with opposite helicities [12][13][14], making AFM materials promising for magnonic devices.…”

Section: Introductionmentioning

confidence: 99%

Light-induced Dzyaloshinskii-Moriya interactions in antiferromagnetic metals

Hanslin,

Qaiumzadeh

2020

Preprint

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The Dzyaloshinskii-Moriya (DM) interaction plays an essential role in novel topological spintronics, and the ability to control this chiral interaction is of key importance. Developing a general microscopic framework to compute nonequilibrium DM interactions, we theoretically show that the ac electric field component of a laser pulse induces nonequilibrium static DM interactions in an antiferromagnetic (AFM) system in the presence of relativistic spin-orbit coupling. These nonequilibrium DM interactions might even be anisotropic depending on the direction of magnetic moments and the laser pulse polarization. We further show that intense polarized laser pulses can in principle generate both classes of DM interactions, i.e., bulk-type and interfacial-type, in a magnetic system even though the crystal symmetry prohibits one of them in equilibrium. Our results reveal another aspect of rich behavior of periodically driven spin systems and the far-from-equilibrium magnetic systems.

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Domain walls in antiferromagnets: The effect of Dzyaloshinskii–Moriya interactions

Abstract: Note: This paper is part of the special topic on Antiferromagnetic Spintronics.

Cited by 10 publications

References 49 publications

Collective dynamics of domain walls: an antiferromagnetic spin texture in an optical cavity

Collective dynamics of domain walls: an antiferromagnetic spin texture in an optical cavity

Magnetostriction and magnetostructural domains in CoTiO$_3$

Light-induced Dzyaloshinskii-Moriya interactions in antiferromagnetic metals

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