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arXiv 1805.03360cond-mat.mes-hall
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非中心对称铁磁体中Skyrmion和螺旋调制的交叉

Crossover of skyrmion and helical modulations in noncentrosymmetric ferromagnets

Andrey O. Leonov, Alexei N. Bogdanov

摘要:

在非中心对称铁磁体的有序温度附近产生的角(扭曲)和纵向调制之间的耦合强烈地影响了skyrmion态的结构及其在外加磁场中的演化。在立方helimagnets的前体状态中,Skyrmion晶格到饱和状态的连续变换被伴随着多畴态形成的一阶过程所取代。最近的效果施加的主导纵向调制已报告在体MnSi和FeGe。类似的现象可以观察到在立方helimagnet外延层的前体区域和易平面手性铁磁体(例如,在六方helimagnet CrNb3S6)。

英文摘要:

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).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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