Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-Ray Imaging of Mixed States of Skyrmions and Helices in FeGe   We report scanning transmission X-ray microscopy of mixed helical and
skyrmion magnetic states in thin FeGe lamellae. This imaging of the
out-of-plane magnetism allows clear identification of the different magnetic
states, and reveals details about the coexistence of helical and skyrmion
states. In particular, our data show that finite length helices are
continuously deformable down to the size of individual skyrmions and are hence
topologically equivalent to skyrmions. Furthermore, we observe transition
states between helical and skyrmion states across the thickness of the lamella
that are evidence for frozen Bloch points in the sample after field cooling.

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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph