Theory of magnetization in multiferroics: Competition between ferromagnetic and antiferromagnetic domains

Gomonay, Olena; Korniienko, I. G.; Локтев, В. М.

doi:10.1103/physrevb.83.054424

Cited by 8 publications

(6 citation statements)

References 40 publications

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“…Below 0.7 T, the gradients become steeper. The coercive field is about 0.15 T. In the magnetic field dependence of the resistance curve, no sizable change of SMR signal is observed below 0.7 T and the linear dependence of the resistance is observed above 0.7 T. According to the theoretical consideration of domain redistribution of the competition between AFM and weak FM [41], there are four-type domains and the domain redistribution behavior in external magnetic field is expected as shown in Fig. 5(c).…”

Section: Resultsmentioning

confidence: 97%

“…The Zeeman energy in a material like SFO may additionally lead to a linear field-dependent term, stemming from the field-induced canting of the magnetic moments, which does not lead to a measurable SMR signal in NiO. On the other hand, the complicated domain structures due to the competition between AFM and weak FM should appear below the monodomainization field [41], which is discussed later.…”

Section: Resultsmentioning

confidence: 99%

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Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃

Hajiri

Baldrati

Lebrun

et al. 2019

J. Phys.: Condens. Matter

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We report a combined study of imaging the antiferromagnetic (AFM) spin structure and measuring the spin Hall magnetoresistance (SMR) in epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO 3 . Xray magnetic linear dichroism photoemission electron microscopy measurements reveal that the AFM spins of the SmFeO 3 (110) align in the plane of the film. Angularly dependent magnetoresistance measurements show that SmFeO 3 /Ta bilayers exhibit a positive SMR, in contrast to the negative SMR expected in previously studied collinear AFMs. The SMR amplitude increases linearly with increasing external magnetic field at higher magnetic field, suggesting that fieldinduced canting of the AFM spins plays an important role. In contrast, around the coercive field, no detectable SMR signal is observed, indicating that SMR of AFM and canting magnetization components cancel out. Below 50 K, the SMR amplitude increases sizably by a factor of two as compared to room temperature, which likely correlates with the long-range ordering of the Sm ions. Our results show that the SMR is a sensitive technique for non-equilibrium spin system of non-collinear AFM systems.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃

Hajiri

Baldrati

Lebrun

et al. 2019

J. Phys.: Condens. Matter

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“…Structural domains may arise from previously unresolved high-temperature orthorhombic distortions, which impose spatially nonuniform uniaxial anisotropy below T N,I . The system may also be subject to extrinsic stresses from crystallographic defects as well as intrinsic stresses that are expected to accompany AFM order in finite crystals [25,27].…”

Section: Md(c) Ijkmentioning

confidence: 99%

“…Four degenerate 90 • -rotated AFM domain configurations correspond to M along [110], [ 110], [ 11 0] or [ 1 10], which can in principle be distinguished via MD SHG. A previous study used bulk magnetometry to infer the existence of stable AFM domains with 90°relative orientations and a domain wall phase transition near 100 K [7], where it was proposed that domains are stabilized by entropic [7] or magnetoelastic [25] effects. However, direct observation of AFM domains has remained elusive.…”

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confidence: 99%

Direct visualization and control of antiferromagnetic domains and spin reorientation in a parent cuprate

Seyler

Ron

et al. 2022

Phys. Rev. B

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We report magnetic optical second-harmonic generation (SHG) polarimetry and imaging on Sr2Cu3O4Cl2, which allows direct visualization of the mesoscopic antiferromagnetic (AFM) structure of a parent cuprate. Temperature-and magnetic-field-dependent SHG reveals large domains with 90 • relative orientations that are stabilized by a combination of uniaxial magnetic anisotropy and the Earth's magnetic field. Below a temperature T R ∼ 97 K, we observe an unusual 90 • spin reorientation transition, possibly driven by competing magnetic anisotropies of the two copper sublattices, which swaps the AFM domain states while preserving the domain structure. This allows deterministic switching of the AFM states by thermal or laser heating. Near T R , the domain walls become exceptionally responsive to an applied magnetic field, with the Earth's field sufficient to completely expel them from the crystal. Our findings unlock opportunities to study the mesoscopic AFM behavior of parent cuprates and explore their potential for AFM technologies.

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“…[575] The key difference with ferromagnetic solvers lies in the simultaneous solution of coupled LLG equations for each of the sublattices of the sample. The description of realistic samples will require an implementation of proper models of magnetoelasticity [501,[576][577][578] and stray fields. The magnetoelastic coupling potentially can utilize numerical methods for the evaluation of magnetostatics in ferromagnets.…”

Section: Numericsmentioning

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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Theory of magnetization in multiferroics: Competition between ferromagnetic and antiferromagnetic domains

Cited by 8 publications

References 40 publications

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃

Direct visualization and control of antiferromagnetic domains and spin reorientation in a parent cuprate

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

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Theory of magnetization in multiferroics: Competition between ferromagnetic and antiferromagnetic domains

Cited by 8 publications

References 40 publications

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO3

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO3

Direct visualization and control of antiferromagnetic domains and spin reorientation in a parent cuprate

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

Contact Info

Product

Resources

About

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃

Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO₃