Výsledky vyhledávání - "Ntallis, Nikolaos"

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Tuning skyrmions in B20 compounds by 4d and 5d doping

Autor: Borisov, Vladislav, Xu, Qichen, Ntallis, Nikolaos, Clulow, Rebecca, Shtender, Vitalii, Cedervall, Johan, Sahlberg, Martin, Wikfeldt, Kjartan Thor, Thonig, Danny, Pereiro, Manuel, Bergman, Anders, Delin, Anna, Eriksson, Olle

Skyrmion stabilization in novel magnetic systems with the B20 crystal structure is reported here, primarily based on theoretical results. The focus is on the effect of alloying on the 3d sublattice of the B20 structure by substitution of heavier 4d a

Externí odkaz: http://arxiv.org/abs/2204.08496

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Macrospin model of an assembly of magnetically coupled core-shell nanoparticles

Autor: Ntallis, Nikolaos, Kons, Corisa, Srikanth, Hariharan, Phan, Manh-Huong, Arena, D. A., Pereiro, Manuel

Highly sophisticated synthesis methods and experimental techniques allow for precise measurements of magnetic properties of nanoparticles that can be reliably reproduced using theoretical models. Here, we investigate the magnetic properties of ferrit

Externí odkaz: http://arxiv.org/abs/2106.01844

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Spin Canting in Exchange Coupled Bi-Magnetic Nanoparticles: Interfacial Effects and Hard / Soft Layer Ordering

Autor: Kons, C., Krycka, K. L., Robles, J., Ntallis, Nikolaos, Pereiro, Manuel, Phan, Manh-Huong, Srikanth, Hariharan, Borchers, J. A., Arena, D. A.

We investigate the spatial distribution of spin orientation in magnetic nanoparticles consisting of hard and soft magnetic layers. The nanoparticles are synthesized in a core / shell spherical morphology where the magnetically hard, high anisotropy l

Externí odkaz: http://arxiv.org/abs/2105.11501

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On the connection between magnetic interactions and the spin-wave gap of the insulating phase of NaOsO$_{3}$

Autor: Ntallis, Nikolaos, Borisov, Vladislav, Kvashnin, Yaroslav O., Thonig, Danny, Sjöqvist, Erik, Bergman, Anders, Delin, Anna, Eriksson, Olle, Pereiro, Manuel

The scenario of a metal-insulator transition driven by the onset of antiferromagnetic order in NaOsO$_3$ calls for a trustworthy derivation of the underlying effective spin Hamiltonian. To determine the latter we rely on {\it ab initio} electronic-st

Externí odkaz: http://arxiv.org/abs/2105.04893

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A majority gate for two-dimensional ferromagnets lacking inversion symmetry

Autor: Ntallis, Nikolaos, Bergman, Anders, Delin, Anna, Eriksson, Olle, Sjoqvist, Erik, Thonig, Danny, Pereiro, Manuel

Publikováno v: Phys. Rev. Research 3, 023225 (2021)

The manipulation of topologically protected field configurations, already predicted and experimentally observed in non-centrosymmetric magnets, as skyrmions, merons and antimerons could definitely have potential applications in logic gate operations

Externí odkaz: http://arxiv.org/abs/2103.12004

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Heisenberg and anisotropic exchange interactions in magnetic materials with correlated electronic structure and significant spin-orbit coupling

Autor: Borisov, Vladislav, Kvashnin, Yaroslav O., Ntallis, Nikolaos, Thonig, Danny, Thunström, Patrik, Pereiro, Manuel, Bergman, Anders, Sjöqvist, Erik, Delin, Anna, Nordström, Lars, Eriksson, Olle

Publikováno v: Phys. Rev. B 103, 174422 (2021)

The Dzyaloshinskii-Moriya (DM) interaction, as well as symmetric anisotropic exchange, are important ingredients for stabilizing topologically non-trivial magnetic textures, such as, e.g., skyrmions, merons and hopfions. These types of textures are c

Externí odkaz: http://arxiv.org/abs/2011.08209

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