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
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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:
Phyiscal Review Applied
影响因子:
--
通讯作者:
Dafine Ravelosona
Dafine Ravelosona
中科院分区:
其他
文献类型:
--
作者:
Xueying Zhang;Nicolas Vernier;Weisheng Zhao;Haiming Yu;Laurent Vila;Yue Zhang;Dafine Ravelosona

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磁畴壁的表面能对其静态和动态行为有很大的影响。然而,这种效应很少被直接观察到,并且一些相关的现象也不太清楚。此外,一个可靠的方法来量化的DW表面能仍然是缺席。在这里,我们报告了一系列的实验中,DW表面能成为一个主导参数。我们观察到半圆形磁畴泡在DW表面能引起的拉普拉斯压力作用下可以自发坍缩。我们进一步证明了当DW在霍尔交叉中或从纳米线进入成核垫时,表面能可以导致几何诱导的钉扎。在此基础上,我们提出了两种量化DW表面能的方法,这对磁性薄膜中的Dzyaloshinskiii-Moriya相互作用或交换刚度等内禀参数的估计是非常有帮助的。
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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发表时间: 2008-03-01
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