Chizhik Alexander, Zhukova Valentina, Zhukov Arcady
Department Advanced Polymers and Materials: Physics, Chemistry and Technology, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain.
Department of Applied Physics, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain.
Sensors (Basel). 2025 Aug 12;25(16):5000. doi: 10.3390/s25165000.
In the pursuit of active elements for bending and curvature sensors, magneto-optical investigations were performed on bent microwires. For the first time, local surface magnetization reversal curves were obtained from various sides of bent Co-rich and Fe-rich microwires. The observed differences in surface magnetization reversal behavior are directly attributed to the transverse distribution of internal mechanical stresses, which range from maximum tensile stress on the outer side of the bent sample to maximum compressive stress on the inner side. Depending on the sample composition and the nature of local stress, distinct magnetic structures-axial, elliptical, and spiral-were identified in different locations on the surface of the microwire. These findings provide valuable insights into the operational mechanisms of bending-sensitive magnetic sensors.
在寻找用于弯曲和曲率传感器的活性元件过程中，对弯曲的微丝进行了磁光研究。首次从富钴和富铁弯曲微丝的不同侧面获得了局部表面磁化反转曲线。观察到的表面磁化反转行为差异直接归因于内部机械应力的横向分布，其范围从弯曲样品外侧的最大拉应力到内侧的最大压应力。根据样品成分和局部应力的性质，在微丝表面的不同位置识别出了不同的磁性结构——轴向、椭圆形和螺旋形。这些发现为弯曲敏感磁传感器的工作机制提供了有价值的见解。
