  We show that properly engineered amorphous Fe-Gd alloy thin films with
perpendicular magnetic anisotropy exhibit room-temperature skyrmion molecules,
or a pair of like-polarity, opposite-helicity skyrmions. Magnetic mirror
symmetry planes present in the stripe phase, instead of chiral exchange,
determine the internal skyrmion structure and the net achirality of the
skyrmion phase. Our study shows that stripe domain engineering in amorphous
alloy thin films may enable the creation of skyrmion phases with
technologically desirable properties.
