Barkhausen noise emission in soft magnetic bilayer ribbons has been investigated. The monolithic amorphous Fe_73.5Nb₃Si_13.5B₉Cu₁/Fe_74.5Nb₃Si_13.5B₉ bilayer system was produced by double-nozzle melt-spinning. It was subsequently used to measure the Barkhausen noise emission in the amorphous state as well as in the annealed state as a function of magnetizing voltage. The asymmetry of the Barkhausen noise emission during cyclic magnetization was also investigated. It was found that the amorphous ribbon produces the conventional single burst, whereas the annealed ribbon emits bursts in which Barkhausen noise originating from the different layers can be easily distinguished. Moreover, a gentle asymmetry in the consecutive Barkhausen noise envelopes produced by ascending and descending magnetic fields was detected. The hysteresis loop for the annealed ribbon exhibits a two-step magnetization process in which the contribution of the different layers can be clearly distinguished.

中文翻译：

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软磁双层带中的巴克豪森噪声发射

已经研究了软磁双层带中的巴克豪森噪声发射。单片非晶 Fe _73.5 Nb ₃ Si _13.5 B ₉ Cu ₁ /Fe _74.5 Nb ₃ Si _13.5 B ₉双层系统是通过双喷嘴熔纺生产的。随后，它被用来测量作为磁化电压函数的非晶态和退火态的巴克豪森噪声发射。还研究了循环磁化期间巴克豪森噪声发射的不对称性。发现非晶带产生传统的单脉冲，而退火带发出脉冲，其中可以很容易地区分源自不同层的巴克豪森噪声。此外，检测到由上升和下降磁场产生的连续巴克豪森噪声包络中的轻微不对称性。退火带的磁滞回线表现出两步磁化过程，其中可以清楚地区分不同层的贡献。