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 EIG, UPV/EHU, 20018 San Sebastian, Spain.
Sensors (Basel). 2023 Mar 13;23(6):3079. doi: 10.3390/s23063079.
We studied the magnetic properties of a glass-covered amorphous microwire that was stress-annealed at temperatures distributed along the microwire length. The Sixtus-Tonks, Kerr effect microscopy and magnetic impedance techniques have been applied. There was a transformation of the magnetic structure across the zones subjected to annealing at different temperatures. The annealing temperature distribution induces the graded magnetic anisotropy in the studied sample. The variety of the surface domain structures depending on the longitudinal location has been discovered. Spiral, circular, curved, elliptic and longitudinal domain structures coexist and replace each other in the process of magnetization reversal. The analysis of the obtained results was carried out based on the calculations of the magnetic structure, assuming the distribution of internal stresses.
我们研究了在沿微丝长度分布的温度下进行应力退火的覆层非晶态微丝的磁性能。应用了西克斯托-汤克斯、克尔效应显微镜和磁阻抗技术。在经过不同温度退火的区域之间，磁结构发生了转变。退火温度分布在研究样品中诱导出了梯度磁各向异性。发现了表面畴结构随纵向位置的变化。在磁化反转过程中，螺旋、圆形、弯曲、椭圆形和纵向畴结构共存并相互替代。基于假设内部应力分布的磁结构计算，对所获得的结果进行了分析。
