Faurie D, Challab N, Haboussi M, Zighem F
LSPM-CNRS, UPR3407, Université Sorbonne Paris Nord, 93430, Villetaneuse, France.
Nanoscale. 2022 Jan 20;14(3):1014-1016. doi: 10.1039/d1nr01773j.
In a recent paper (G. Muscas ),1 the magnetomechanical behavior of cobalt (Co) magnetic nanowire arrays on a polymeric substrate (polyethylene naphthalate (PEN)) under bending was measured by magneto-optical Kerr effect (MOKE) magnetometry . The authors showed that the magnetomechanical effects were very small and assigned this result to a low effective magnetostriction coefficient due to the nanostructuring. In this comment, we show by numerical calculations that it is the ongoing/current stress distribution within the system that generates this effect. Indeed, the nanostructures being very rigid with respect to the compliant substrate, the strains are mainly concentrated in the substrate and less than 3% of the macroscopic stress is transmitted to the nanostructures.
在最近的一篇论文（G. 马斯卡斯）中，通过磁光克尔效应（MOKE）磁力测量法测量了聚合物基底（聚萘二甲酸乙二醇酯（PEN））上钴（Co）磁性纳米线阵列在弯曲状态下的磁机械行为。作者表明磁机械效应非常小，并将此结果归因于由于纳米结构导致的低有效磁致伸缩系数。在本评论中，我们通过数值计算表明，是系统内持续/当前的应力分布产生了这种效应。实际上，纳米结构相对于柔顺的基底非常刚硬，应变主要集中在基底中，并且不到3%的宏观应力传递到纳米结构上。
