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**It is widely believed that integer quantum Hall systems do
not have fractional excitations. Here we show the converse to be true for a
class of systems where integer quantum Hall effect emerges spontaneously due to
the interplay of itinerant electrons and noncoplanar magnetic ordering. We show
that magnetic $Z_2$ vortices in such systems, whose topological stability is
guaranteed by the structure of the order parameter, indeed carry fractional
charge.**

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