Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble
Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble
复制标题
通过缩小或膨胀磁泡直接观察磁畴壁表面张力
DOI:
10.1103/physrevapplied.9.024032
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发表时间:
2017-08
期刊:
影响因子:
--
通讯作者:
Dafine Ravelosona
中科院分区:
文献类型:
--
作者:
Xueying Zhang;Nicolas Vernier;Weisheng Zhao;Haiming Yu;Laurent Vila;Yue Zhang;Dafine Ravelosona
The surface energy of a magnetic domain wall (DW) strongly affects its static and dynamic behaviors..However, this effect is seldom directly observed, and some of the related phenomena are not well.understood. Moreover, a reliable method to quantify the DWsurface energy is still absent. Here, we report a.series of experiments in which the DW surface energy becomes a dominant parameter. We observe that a.semicircular magnetic domain bubble can spontaneously collapse under the Laplace pressure induced by.DW surface energy. We further demonstrate that the surface energy can lead to a geometrically induced.pinning when the DW propagates in a Hall cross or from a nanowire into a nucleation pad. Based on these.observations, we develop two methods to quantify the DWsurface energy, which can be very helpful in the.estimation of intrinsic parameters such as Dzyaloshinskii-Moriya interactions or exchange stiffness in.magnetic ultrathin films.
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