||Bubble and skyrmion crystals in frustrated magnets with easy-axis anisotropy
Hayami, Satoru ,
Lin, Shi-ZengBatista, Cristian D.
, p.184413 , 2016-05-13 , American Physical Society (APS)
We clarify the conditions for the emergence of multiple-Qstructures out of lattice and easy-axis spin anisotropy in frustrated magnets. By considering magnets whose exchange interaction has multiple global minima in momentum space, we find that both types of anisotropy stabilize triple-Q orderings. Moderate anisotropy leads to a magnetic-field-induced skyrmion crystal, which evolves into a bubble crystal for increasing spatial and spin anisotropy. The bubble crystal exhibits a quasicontinuous (devil's staircase) temperature-dependent ordering wave vector, characteristic of the competition between frustrated exchange and strong easy-axis anisotropy.