Stress-driven magnetic Barkhausen noise generation in FeCo magnetostrictive alloy
Stress-driven magnetic Barkhausen noise generation in FeCo magnetostrictive alloy
复制标题
FeCo 磁致伸缩合金中应力驱动的磁性巴克豪森噪声产生
DOI：
10.1109/tmag.2021.3126898
复制
发表时间：
2021
影响因子：
2.1
通讯作者：
W. Nakao
中科院分区：
文献类型：
--
作者：
T. Yamazaki;Y. Furuya;S. Hata;W. Nakao
应力驱动的磁巴克豪森噪声 (MBN) 可用于开发高灵敏度动态力传感器。 MBN 是由于外部场引起的铁磁材料中的畴壁移动而产生的合成脉冲。在这项研究中，我们使用具有高磁致伸缩常数的铁磁材料 () 深入了解 MBN 对外部应力的响应能力。我们通过单轴压缩测试证明了由强织构 Fe29Co71 合金线 (ppm)/环氧树脂复合材料制成的应力驱动 MBN，在 55 mT 的静态偏置磁场下将应力率水平从 0.55 GPa/s 更改为 28 GPa/s。外力应力率与 MBN 输出电压均方根 (rms) 值之间的关系表现出高灵敏度，即可接受的线性度，可用于定量评估动态力。这种应力驱动的 MBN 生成机制可能基于 FeCo 合金的逆磁致伸缩效应引起的磁畴壁运动。我们相信，这项研究将有助于专注于动态磁致伸缩机制的研究和无电池高灵敏度力传感器的新颖应用的开发。
Stress-driven magnetic Barkhausen noise (MBN) can be potentially used to develop a high-sensitivity dynamic force sensor. MBN is a compositional pulse due to the domain wall movement in ferromagnetic material induced by the external field. In this study, we provide an in-depth understanding of the responsiveness of MBN to external stress using ferromagnetic materials with a high magnetostriction constant (). We demonstrate stress-driven MBN from strong textured Fe29Co71alloy wires (ppm)/epoxy resin composite via uniaxial compression testing by changing the stress rate level from 0.55 to 28 GPa/s under a static bias magnetic field of 55 mT. The relationship between the stress rate of the external force and root-mean-square (rms) value of MBN output voltages showed high sensitivity, i.e.,, and acceptable linearity that could be used to quantitatively evaluate the dynamic force. This stress-driven MBN generation mechanism could be based on the domain wall movement induced by the inverse magnetostrictive effect of FeCo alloys. We believe that this study will aid in the research focusing on the dynamic magnetostrictive mechanism and development of novel applications for high-sensitivity force sensors that have no batteries.