Elastic Domains in Antiferromagnets on Substrates

Brener, Efim A.; Марченко, В. И.

doi:10.1103/physrevlett.97.067204

Cited by 3 publications

(4 citation statements)

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“…could be considered as the boundary conditions. They differ from the standard boundary conditions for AFMs (see, e.g., 26,27 ) due to the presence of the additional surface term with K sur . In the limit K sur → 0 the solutions of equations (9), (10), (11) are well known: the AFM vector L(r) = const lies along one of the easy axes (ϕ in = 0 or π/2), the displacement vector u(r) generates the homogeneous field of the magnetically-induced strain:…”

Section: Modelmentioning

confidence: 78%

Section: Modelmentioning

confidence: 78%

“…Substituing ( 21), ( 22) and ( 23), (24) into equation ( 8), we obtain expressions (27), where coefficients K sh 2 , K sh 4 depend on variables ϕ (in) :…”

mentioning

confidence: 99%

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Shape-induced anisotropy in antiferromagnetic nanoparticles

Gomonay¹,

Kondovych²,

Локтев³

2014

Journal of Magnetism and Magnetic Materials

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High fraction of the surface atoms considerably enhances the influence of size and shape on the magnetic and electronic properties of nanoparticles. Shape effects in ferromagnetic nanoparticles are well understood and allow to set and control the parameters of a sample that affect its magnetic anisotropy during production. In the present paper we study the shape effects in the other widely used magnetic materials -antiferromagnets, -which possess vanishingly small or zero macroscopic magnetization. We take into account the difference between the surface and bulk magnetic anisotropy of a nanoparticle and show that the effective magnetic anisotropy depends on the particle shape and crystallographic orientation of its faces. Corresponding shape-induced contribution to the magnetic anisotropy energy is proportional to the particle volume, depends on magnetostriction, and can cause formation of equilibrium domain structure. Crystallographic orientation of the nanoparticle surface determines the type of domain structure. The proposed model allows to predict the magnetic properties of antiferromagnetic nanoparticles depending on their shape and treatment.

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Section: Modelmentioning

confidence: 78%

Section: Modelmentioning

confidence: 78%

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Shape-induced anisotropy in antiferromagnetic nanoparticles

Gomonay¹,

Kondovych²,

Локтев³

2014

Journal of Magnetism and Magnetic Materials

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“…At the same time, antiferromagnets might offer other ways of linkage of the geometry and magnetic subsystem. For instance, magnetoelasticity, which is expected to be strong in antiferromagnets, where the mechanical strain is one of the mechanisms leading to the domains formation, [527][528][529] for example, in NiO samples. [530] Quantum Systems: Even for spin chains, current theories [444,446] treat them classically.…”

Section: Theorymentioning

confidence: 99%

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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condensed matter physics, including cell membranes, [1] nematic crystals, [2,3] superfluids, [4] semiconductors, [5][6][7][8] ferromagnets, [9] and superconductors. [10,11] Currently, much attention is paid to strongly correlated electronic systems, for example, ferromagnets and superconductors, as they provide a unique tool to manipulate the topology of coexisting vector and scalar fields, associated with geometries of conventional systems.Until recently, in the case of magnetism, the influence of the geometry on the spin vector fields was addressed primarily by the design of the sample boundaries. This approach naturally brings the shape anisotropy to the system and leads to the formation of specific spin textures, for example, magnetic vortices [12] and antivortices [13] as well as provides control over the dynamics of the topologically nontrivial magnetic solitons. [14][15][16][17][18] This discussion also tackles the state of the art in modern experimental antiferromagnetism, where the design of the sample topography and boundaries allows to control the domain wall states. [19][20][21][22] With the development of novel fabrication techniques allowing to realize complex 3D architectures, not only the boundary effects but also the extrinsic geometrical properties (e.g., local curvatures) can be addressed rigorously for the case of ferromagnets [23][24][25][26][27] as well as superconductors. [28][29][30] The explored effects are directly related to the interplay between the Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro-and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-...

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Visualization of ferromagnetic domains inErNi2B2Csingle crystals: Weak ferromagnetism and its coexistence with superconductivity

2007

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The magnetic flux structure in the basal plane, (001), of single crystals of superconducting (R = Er) and non-superconducting (R = Tb) RNi 2 B 2 C was studied by high resolution Bitter decoration at temperatures below T c (superconducting transition) and/or T N (antiferromagnetic transition). For both materials two sets of domain boundaries, in {110} and {100} planes, were observed. The temperature ranges in which the {100} domain boundaries were observed in TbNi 2 B 2 C and ErNi 2 B 2 C coincide with the weak ferromagnetic (WFM) ordering in these materials. On the other hand, the {110} twin boundaries -the antiferromagnetic domain boundaries -were observed in both compounds below T N . The possibility of interpretation of {100} boundaries as Bloch domain walls in the weakly ferromagnetic phase, for T < T W F M < T N (TbNi 2 B 2 C) or T < T W F M < T N < T c (ErNi 2 B 2 C) is discussed. PACS numbers: 75.50.Ee, 75.60.Ch 1 I.F. Lyuksyutov, V.L. Pokrovsky, Adv. Phys. 54, 67 (2005). 2 A.I. Buzdin, Rev. Mod. Phys. 77, 935 (2005). 3 V.V. Ryazanov, V.A. Oboznov, A.S. Prokof'ev, S.V. Dubonos, Pis'ma Zh.

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Elastic Domains in Antiferromagnets on Substrates

Cited by 3 publications

References 10 publications

Shape-induced anisotropy in antiferromagnetic nanoparticles

Shape-induced anisotropy in antiferromagnetic nanoparticles

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

Visualization of ferromagnetic domains inErNi2B2Csingle crystals: Weak ferromagnetism and its coexistence with superconductivity

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