Universal patterns of skyrmion magnetizations unveiled by defect implantation
Skyrmions are spin-swirling textures hosting wonderful properties with potential implications in information technology. Such magnetic particles carry a magnetization, whose amplitude is crucial to establish them as robust magnetic bits, while their topological nature gives rise to a plethora of exq...
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Main Authors | , |
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Format | Journal Article |
Language | English |
Published |
10.12.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Skyrmions are spin-swirling textures hosting wonderful properties with
potential implications in information technology. Such magnetic particles carry
a magnetization, whose amplitude is crucial to establish them as robust
magnetic bits, while their topological nature gives rise to a plethora of
exquisite features such as topological protection, the skyrmion and topological
Hall effects as well as the topological orbital moment. These effects are all
induced by an emergent magnetic field directly proportional to the three-spin
scalar chirality, $\chi= (\mathbf{S}_i\times\mathbf{S}_j)\cdot \mathbf{S}_k$,
and shaped by the peculiar spatial dependence of the magnetization. Here, we
demonstrate the existence of novel chiral magnetizations emerging from the
interplay of spin-orbit interaction and either $\chi$ or the two-spin vector
chirality $\boldsymbol{\kappa} = \mathbf{S}_i\times\mathbf{S}_j$. By
scrutinizing correlations among the spin, orbital (trivial and chiral)
magnetizations, we unveil from ab-initio universal patterns, quantify the rich
set of magnetizations carried by single skyrmions generated in PdFe bilayer on
Ir(111) surface and demonstrate the ability to engineer their magnitude via
controlled implantation of impurities. We anticipate that our findings can
guide the design of disruptive storage devices based on skyrmionic bits by
encoding the desired magnetization with strategic seeding of defects. |
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DOI: | 10.48550/arxiv.2312.05903 |