Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets

The coupling between angular (twisting) and longitudinal modulations arising near the ordering temperature of noncentrosymmetric ferromagnets strongly influences the structure of skyrmion states and their evolution in an applied magnetic field. In the precursor states of cubic helimagnets, a continu...

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Bibliographic Details
Published in:arXiv.org 2018-05
Main Authors: Leonov, Andrey O, Bogdanov, Alexei N
Format: Article
Language:English
Subjects:
Crossovers
Ferromagnetism
Hypothetical particles
Lattices
Particle theory
Precursors
Twisting
Online Access:Get full text
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Summary:The coupling between angular (twisting) and longitudinal modulations arising near the ordering temperature of noncentrosymmetric ferromagnets strongly influences the structure of skyrmion states and their evolution in an applied magnetic field. In the precursor states of cubic helimagnets, a continuous transformation of skyrmion lattices into the saturated state is replaced by the first-order processes accompanied by the formation of multidomain states. Recently the effects imposed by dominant longitudinal modulations have been reported in bulk MnSi and FeGe. Similar phenomena can be observed in the precursor regions of cubic helimagnet epilayers and in easy-plane chiral ferromagnets (e.g. in the hexagonal helimagnet CrNb3S6).
ISSN:2331-8422
DOI:10.48550/arxiv.1805.03360