具有非对称磁滞回线的钴基非晶带局域晶化表征的研究

The research of the characteristic of local crystalline phases in Co-based amorphous ribbon with asymmetrical loop

热磁处理后的钴基非晶薄带的磁滞回线具有不对称的特性。这种非对称的磁滞回线特性可以在室温下获得。对该现象的影响因素进行了实验观测和简单的唯象解释,认为热磁处理的非晶薄带基体内形成的磁性偏硬的结晶相是促成这种奇异现象产生的重要因素之一。首先经过系列试验找到一种稳定而可行的热磁处理方法,然后重点讨论经热磁处理的钴基非晶带中微晶相结构特征与热磁条件之间的依赖关系,以获取有潜在实用价值的回线偏置型软磁材料。

The hysteresis loops of the longitudinal field annealed Co58Fe5Ni10Si11B16 amorphous ribbons have an asymmetrical characteristic. This feature can be obtained at room temperature. Several factors about the formation of the phenomenon have been discussed by the experimental observation and simple phenomenological explanation. One of the significant factors, which can promote this behavior, is the magnetically harder crystalline phases grown in the amorphous matrix during annealing. Much attention was paid here to pursue a proper thermomagnetic process, which can provide a way to shift the loop of Co-based ribbons. The dependence of the microstructual characteristics of local crystalline phases on the annealing conditions was deeply studied. Based on this avenue, the Co-based ribbons with interesting asymmetrical magnetic feature can be manufactured for potential application.