Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3
Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3
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DOI：
10.1103/physrevb.97.134403
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发表时间：
2018-04-05
影响因子：
3.7
通讯作者：
Balakrishnan, G.
中科院分区：
文献类型：
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作者：
Loudon, J. C.;Leonov, A. O.;Balakrishnan, G.
我们报道了在非中心对称铁磁体中发现了有吸引力的磁天子及其团簇。这些三维孤子已经被预言存在于手性铁磁体的锥体相中[J·物理：康登斯。物质28，35LT01(2016)]，与发生在磁饱和状态的更常见的排斥轴对称天米子有根本的不同。我们给出了用透射电子显微镜拍摄的Cu2OSeO_3单晶样品中这些Skyrmion团簇的真实空间图像，并发展了一个描述这种Skyrmion的唯象理论。
We report the discovery of attractive magnetic skyrmions and their clusters in noncentrosymmetric ferromagnets. These three-dimensional solitons have been predicted to exist in the cone phase of chiral ferromagnets [J. Phys: Condens. Matter 28, 35LT01 (2016)] and are fundamentally different from the more common repulsive axisymmetric skyrmions that occur in the magnetically saturated state. We present real-space images of these skyrmion clusters in thin (similar to 70 nm) single-crystal samples of Cu2OSeO3 taken using transmission electron microscopy and develop a phenomenological theory describing this type of skyrmion.