Modulation of magnetic anisotropy by bending in Ni and Ni78Fe22 thin films on polycarbonate organic substrates
Modulation of magnetic anisotropy by bending in Ni and Ni78Fe22 thin films on polycarbonate organic substrates
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DOI：
10.1016/j.jmmm.2023.170497
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发表时间：
2023-02-09
影响因子：
2.7
通讯作者：
Kaiju, Hideo
中科院分区：
文献类型：
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作者：
Ohashi, Yuri;Matsushima, Yu;Kaiju, Hideo
我们研究了聚碳酸酯（PC）衬底上的Ni和Ni 78 Fe 22薄膜的表面形貌和磁/电性能，其中各向异性磁电阻（AMR）效应和磁各向异性场的弯曲依赖性是集中的。Ni（Ni 78 Fe 22）薄膜的易磁化轴通过将薄膜弯曲成凸（凹）形而旋转。弯曲的Ni/PC膜在一个凹的形状增强了磁电阻（MR）比的1.4倍，并增加了磁各向异性场从13到240 mT。而将Ni 78 Fe 22/PC膜弯曲成凸形，则使MR比提高了1.9倍，并使磁各向异性场从3.4增加到31 mT。这些结果归因于逆磁致伸缩效应。磁致伸缩常数的符号决定了增强AMR效应的弯曲方向。弯曲诱导磁调谐是发展高性能磁性材料和自旋电子器件的有力工具。
We investigate surface morphologies and magnetic/electrical properties, in which the bending dependence of the anisotropic magnetoresistance (AMR) effect and magnetic anisotropic field are focused on, of Ni and Ni78Fe22 thin films on polycarbonate (PC) substrates. The magnetic easy axis of the Ni (Ni78Fe22) thin films is rotated by bending the films in a convex (concave) shape. Bending the Ni/PC films in a concave shape enhances the magnetoresistance (MR) ratio by a factor of 1.4 and increases the magnetic anisotropic field from 13 to 240 mT. Whereas, bending Ni78Fe22/PC films in a convex shape enhances the MR ratio by a factor of 1.9 and increases the magnetic anisotropic field from 3.4 to 31 mT. These results are attributed to the inverse magnetostrictive effect. The results also reveal that the bending direction, which enhances the AMR effect, is determined by the sign of the magnetostriction constant. Bending-induced magnetic tuning can be a powerful tool for developing highperformance magnetic materials and spintronic devices.