Evolution of stripe and bubble domains in antiferromagnetically coupled<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mrow><mml:mo>[</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mtext>Co</mml:mtext><mml:mo>/</mml:mo><mml:mtext>Pt</mml:mtext></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:mn>8</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:mtext>Co</mml:mtext><mml:mo>/</mml:mo><mml:mtext>Ru</mml:mtext></mml:

Bran, Cristina; Butenko, A. B.; Kiselev, Nikolai S.; Wolff, Ulrike; Schultz, L.; Hellwig, Olav; Rößler, U.; Bogdanov, A. N.; Neu, V.

doi:10.1103/physrevb.79.024430

Cited by 39 publications

(21 citation statements)

References 23 publications

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“…At the same time isolated skyrmions have a tendency to elongate and expand into a band with helicoidal or cycloidal modulations and eventually to fill the whole space, since the spiral state represents the minimum with lower energy as compared to the local minima with the metastable isolated skyrmions. These (elliptic) instabilities are similar to 'strip-out' instabilities of isolated magnetic bubbles at a certain critical field [53] observed in common 'bubble-domain' films [38] and in magnetic nanolayers with perpendicular anisotropy [54]. A theory of elliptic instabilities for chiral skyrmions have been developed in [33] where a strip-out field has been derived from the stability analysis of the skyrmion energy (11) with respect to (elliptic) perturbations of type where (e 1  ) [33] .…”

Section: Radial Stability and Collapse At High Field (Discrete Model)supporting

confidence: 60%

The properties of isolated chiral skyrmions in thin magnetic films

et al. 2016

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Axisymmetric solitonic states (chiral skyrmions) were first predicted theoretically more than two decades ago. However, until recently they have been observed in a form of skyrmionic condensates (hexagonal lattices and other mesophases). In this paper we report experimental and theoretical investigations of isolated chiral skyrmions discovered in PdFe/Ir(111) bilayers two years ago by Romming et al (2013 Science 341 636). The results of spin-polarized scanning tunneling microscopy analyzed within the continuum and discrete models provide a consistent description of isolated skyrmions in thin layers. The existence region of chiral skyrmions is restricted by strip-out instabilities at low fields and a collapse at high fields. We demonstrate that the same equations describe axisymmetric localized states in all condensed matter systems with broken mirror symmetry, and thus our findings establish basic properties of isolated skyrmions common for chiral liquid crystals, different classes of noncentrosymmetric magnets, ferroelectrics, and multiferroics.

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Section: Radial Stability and Collapse At High Field (Discrete Model)supporting

confidence: 60%

The properties of isolated chiral skyrmions in thin magnetic films

et al. 2016

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“…In addition to measurements at remanence after applying different field treatments to the samples, an in-field study was carried out using a home-built magnetic stage. 28 The MFM images on the reference samples measured in the ac-demagnetized state are presented in Figs. 4͑a͒ and 4͑b͒.…”

Section: Resultsmentioning

confidence: 99%

Effect of magnetic coupling on the magnetization reversal in arrays of magnetic nanocaps

et al. 2010

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Magnetic ͓Co/ Pd͔ N multilayers grown on assemblies of spherical polystyrene particles were used as a model system for studying the influence of magnetic coupling on the magnetization reversal by changing the size of the nanoparticles as well as the total thickness of the deposited magnetic film. The coercive field and the switching field distribution are found to be strongly dependent on the size of the nanocaps and on the total thickness of the magnetic layer, indicating a strong influence of the magnetic dipole-dipole interaction on the magnetization reversal of the entire array of nanocaps. Moreover, magnetic viscosity measurements allowed the estimation of the magnetic activation volume representing the effect of thermal activation on the switching process. It was found that the magnetic activation volume is substantially smaller compared to the volume of the nanocap and almost independent of the number of bilayers, and thus the total thickness of the nanocap, supporting an inhomogeneous magnetization reversal process.

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“…The tip magnetization direction was perpendicular to the plane of the Si substrate on which the NW was horizontally placed. For the in-field MFM measurements, a home-made stage after [12] was used. The external field was applied with a permanent magnet (H max ∼ 240 kA/m) in the direction parallel to the NW's long axis.…”

Section: Methodsmentioning

confidence: 99%

Magnetization-Switching Study of fcc Fe–Pd Nanowire and Nanowire Arrays Studied by In-Field Magnetic Force Microscopy

et al. 2015

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Using electrodeposition into anodic aluminum oxide (AAO) membranes, we have successfully fabricated near-equiatomic Fe 48±3 Pd 52±3 nanowires (NWs) with the diameter of ≈200 nm and the length of ≈3.5 µm. X-ray diffraction and transmission electron microscopy/selected-area electron diffraction analyses revealed that the as-deposited NWs are isotropic and polycrystalline with an average crystal size of 5 nm and have an fcc crystal structure. Magnetic force microscopy (MFM) on a single Fe-Pd NW revealed its single-domain behavior with the easy axis of magnetization along the long axis of the NW. The magnetizationswitching behavior of a single Fe-Pd NW studied with the MFM suggested a square-shaped magnetization curve (M/M s = 1) with H C ≈ 3.2 kA/m. In addition, using in-field MFM techniques, the effects of dipolar interactions in an Fe-Pd array of NWs still embedded in the AAO were determined. It was found that the dipolar interactions greatly reduce the parameters of the magnetization hysteresis loop, such as the coercivity, the remanence, and the switching-field distribution of the Fe-Pd NW array.Index Terms-Easy axis, Fe-Pd alloy nanowires (NWs), magnetic NWs, magnetostatic interactions, shape anisotropy.

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Evolution of stripe and bubble domains in antiferromagnetically coupled[(Co/Pt)8/Co/Ru

Cited by 39 publications

References 23 publications

The properties of isolated chiral skyrmions in thin magnetic films

The properties of isolated chiral skyrmions in thin magnetic films

Effect of magnetic coupling on the magnetization reversal in arrays of magnetic nanocaps

Magnetization-Switching Study of fcc Fe–Pd Nanowire and Nanowire Arrays Studied by In-Field Magnetic Force Microscopy

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