Imaging and manipulation of skyrmion lattice domains in Cu2OSeO3

Zhang, S. L.; Bauer, Andreas; Berger, H.; Pfleiderer, C.; Laan, G. van der; Hesjedal, T.

doi:10.1063/1.4967499

Cited by 20 publications

(13 citation statements)

References 38 publications

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“…The lower and upper critical field values of B A1 and B A2 are consistent with other reports on Cu 2 OSeO 3 [33]. On the other hand, REXS is able to unambiguously confirm the SkTL phase with its characteristic six-fold-symmetric diffraction pattern [33,37,38]. As shown in Fig.…”

supporting

confidence: 91%

Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures

Ran,

Liu,

Guang

et al. 2020

Preprint

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supporting

confidence: 91%

Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures

Ran,

Liu,

Guang

et al. 2020

Preprint

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“…Direct observation of skyrmions at the nanoscale is experimentally challenging and their existence is often inferred from transport measurements, more precisely from the appearance of an unusual peak in the Hall resistivity. Magnetic force microscopy (MFM), as a real-space imaging technique, has been successfully employed previously to provide convincing evidence of skyrmions 18 – 20 ; however, there is no compelling evidence that such chiral magnetic structures exists in SRO-ferroelectric bilayer films.…”

Section: Introductionmentioning

confidence: 99%

Real-space observation of ferroelectrically induced magnetic spin crystal in SrRuO3

et al. 2021

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Unusual features in the Hall Resistivity of thin film systems are frequently associated with whirling spin textures such as Skyrmions. A host of recent investigations of Hall Hysteresis loops in SrRuO3 heterostructures have provided conflicting evidence for different causes for such features. We have constructed an SrRuO3-PbTiO3 (Ferromagnetic – Ferroelectric) bilayer that exhibits features in the Hall Hysteresis previously attributed to a Topological Hall Effect, and Skyrmions. Here we show field dependent Magnetic Force Microscopy measurements throughout the key fields where the ‘THE’ presents, revealing the emergence to two periodic, chiral spin textures. The zero-field cycloidal phase, which then transforms into a ‘double-q’ incommensurate spin crystal appears over the appearance of the ‘Topological-like’ Hall effect region, and develop into a ferromagnetic switching regime as the sample reaches saturation, and the ‘Topological-like’ response diminishes. Scanning Tunnelling Electron Microscopy and Density Functional Theory is used to observe and analyse surface inversion symmetry breaking and confirm the role of an interfacial Dzyaloshinskii–Moriya interaction at the heart of the system.

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“…From our calculations, |A|/B cr2 ≥ 0.5 is required to observe the large attractive interaction and the domain wall skyrmions. The observed values in real materials for the ratio are |A|/B cr2 ∼ 0.00364 in a Cu 2 OSeO 3 thin film at 5 K [15,68,69], |A|/B cr2 ∼ 0.385 in a Fe 0.7 Co 0.3 Si thin film at 5 K [70,71], and |A|/B cr2 ∼ 1.59 in a Co 8.5 Zn 7.5 Mn 4 thin film at 330 K [35,39]. In the last material, the domain wall skyrmions (or bimerons) indeed appear in a thin film with the thickness ∼ 50 nm.…”

Section: Realistic Values Of Magneto-crystalline Anisotropy Amentioning

confidence: 91%

Controllable inter-skyrmion attractions and resulting skyrmion-lattice structures in two-dimensional chiral magnets with in-plane anisotropy

Kameda,

Koyama,

Nakajima

et al. 2021

Preprint

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We study inter-skyrmion interactions and stable spin configurations in a 2D chiral magnet with in-plane anisotropies of a tilted magnetic field and the magneto-crystalline anisotropy on a (011) thin film. We find that in both cases a small deformation of a skyrmion shape makes the inter-skyrmion interaction anisotropic, and that the skyrmions are weakly bounded along a certain direction due to an emergent attractive interaction. Furthermore, when the magneto-crystalline anisotropy is comparable to the Zeeman energy, skyrmions embedded in a uniform magnetization are tightly bound by creating a magnetic domain between them. The formation of the magnetic domain, and thus the strength of the inter-skyrmion interaction, can be controlled by the direction of an external magnetic field. The anisotropic interaction also affects the skyrmion alignment in the skyrmion crystal (SkX) phase. By employing the Monte Carlo simulation and the micromagnetic simulation, we obtain an elongated triangular lattice structure in the SkX phase. In particular, in the presence of a strong magneto-crystalline anisotropy, magnetic domains appear in the background of the lattice structure, and bimerons aligned on the domain walls form an elongated triangular lattice. We also find a parameter region that the SkX phase is stabilized due to the inter-skyrmion attraction.

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Imaging and manipulation of skyrmion lattice domains in Cu2OSeO3

Cited by 20 publications

References 38 publications

Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures

Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures

Real-space observation of ferroelectrically induced magnetic spin crystal in SrRuO3

Controllable inter-skyrmion attractions and resulting skyrmion-lattice structures in two-dimensional chiral magnets with in-plane anisotropy

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