学術雑誌論文 Bubble and skyrmion crystals in frustrated magnets with easy-axis anisotropy

Hayami, Satoru  ,  Lin, Shi-Zeng  ,  Batista, Cristian D.

93 ( 18 )  , p.184413 , 2016-05-13 , American Physical Society (APS)
ISSN:2469-9950
内容記述
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.
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http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/62728/1/PhysRevB.93.184413.pdf

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