Abstract The investigation addresses the impact of stress on soft magnetic and giant magneto-impedance (GMI) of rapidly quenched Fe77.5Si7.5B15, (Co94Fe6)72.5Si12.5B15 and (Co94Fe6)72.5Si12.5B12.5Nb0.5Cr2 microwires. Differential scanning calorimetry revealed interesting phase stability in the later alloys. The vitrified microwires contained dominant Co and a lean Fe content showed much superior soft magnetic properties and high magnetoimpedance. The alloy microwires incorporated with Nb and Cr manifested lowest coercivity value of 0.034 Oe with a high GMImax value of 425% in the as-quenched state. The uniaxial stress applied on the microwires modified the shape of the hysteresis loops and GMI plots. The hysteresis loops showed stress dependence of coercivity based on alloy chemistry, phase stability and consequent magnetostriction. The GMImax revealed sensitive change with respect to the applied stress in all the alloy microwires. In addition to GMImax interesting features were observed in the GMI profile pertaining influence of stress on the anisotropy field. The anisotropy field shifted systematically in one of the alloy microwires which displayed symmetric dual GMI peaks. The stress was also found to modify the asymmetric characteristics in a microwire.

中文翻译：

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单轴应力对陶瓷磁致伸缩微丝软磁和磁阻抗特性的影响

摘要 本研究涉及应力对快速淬火 Fe77.5Si7.5B15、(Co94Fe6)72.5Si12.5B15 和 (Co94Fe6)72.5Si12.5B12.5Nb0.5Cr2 微丝的软磁和巨磁阻抗 (GMI) 的影响。差示扫描量热法揭示了后期合金中有趣的相稳定性。陶瓷微丝主要含有 Co 和少量 Fe 含量，显示出非常优越的软磁性能和高磁阻抗。掺有 Nb 和 Cr 的合金微丝在淬火状态下表现出 0.034 Oe 的最低矫顽力值和 425% 的高 GMImax 值。施加在微丝上的单轴应力改变了磁滞回线和 GMI 图的形状。磁滞回线显示出基于合金化学、相稳定性和随之而来的磁致伸缩的矫顽力的应力依赖性。GMImax 揭示了所有合金微丝中施加的应力的敏感变化。除了 GMImax 之外，在 GMI 曲线中还观察到了有关应力对各向异性场的影响的有趣特征。各向异性场在显示对称双 GMI 峰的合金微丝之一中系统地移动。还发现应力会改变微丝中的不对称特性。