Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic domain walls of the van der Waals material Fe$_3$GeTe$_2$   Among two-dimensional materials, Fe$_3$GeTe$_2$ has come to occupy a very
important place owing to its ferromagnetic nature with one of the highest Curie
temperatures among known van der Waals materials and the potential for hosting
skyrmions. In this combined experimental and theoretical work, we investigate
the magnetic bubble domains as well as the microscopic domain wall profile
using spin-polarized scanning tunneling microscopy in combination with
atomistic spin-dynamics simulations performed with parameters from density
functional theory calculations. We find a weak magneto-electric effect
influencing the domain wall width by the electric field in the tunneling
junction and determine the critical magnetic field for the collapse of the
bubble domains. Our findings shed light on the origins of complex magnetism
that Fe$_3$GeTe$_2$ exhibits.

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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th