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Durham University

X-ray Science

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How to increase the lifetime of metastable skyrmions

(8 May 2019)

Schematic of metastable Skyrmion tubes.

The UK Skyrmion Project has recently discovered an unusual effect of doping. Single crystals of the chiral cubic material Cu2OSeO3 were grown doped with controlled amounts of zinc. These non-magnetic dopants slightly decrease the overall magnetisation and also reduce slightly the critical temperature TC. Max Birch (PhD student) however found that this caused a dramatic increase in the lifetime of metastable skyrmions by a factor of 50 for just 2.5% zinc doping. Our results have been published in Physical Review Materials and Physical Review B.

Related Publications:
"Origin of skyrmion lattice phase splitting in Zn-substituted Cu2OSeO3"
10.1103/PhysRevMaterials.2.111402

"Increased lifetime of metastable skyrmions by doping"
arXiv:1809.02590