The role of stationarity in magnetic crackling noise
The role of stationarity in magnetic crackling noise
复制标题
平稳性在磁爆裂噪声中的作用
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
S. Zapperi
中科院分区：
文献类型：
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作者：
G. Durin;S. Zapperi
我们讨论平稳性对巴克豪森噪声信号雪崩统计的影响。我们对 Fe85B15 非晶带进行实验测量，并将在信号稳定的矫顽场周围测量的雪崩分布与通过整个磁滞回线采样的雪崩分布进行比较。在第一种情况下，我们恢复的标度指数（τ ∼ 1.38，α ∼ 1.65）接近其他非晶材料的常见观察值，而在第二种情况下，指数明显更大（τ ∼ 1.7，α ∼ 2.2）。我们通过铁磁畴壁脱钉模型对实验结果进行了定量解释。本分析揭示了 Spasojević 等人 (1996 Phys. Rev. E 54 2531) 测量的 Barkhausen 噪声指数异常高的值。
We discuss the effect of stationarity on the avalanche statistics of Barkhausen noise signals. We perform experimental measurements on an Fe85B15 amorphous ribbon and compare the avalanche distributions measured around the coercive field, where the signal is stationary, with those sampled through the entire hysteresis loop. In the first case, we recover scaling exponents (τ ∼ 1.38, α ∼ 1.65) close to the commonly observed values for other amorphous materials, while in the second the exponents are significantly larger (τ ∼ 1.7, α ∼ 2.2). We provide a quantitative explanation of the experimental results through a model for the depinning of a ferromagnetic domain wall. The present analysis sheds light on the unusually high values for the Barkhausen noise exponents measured by Spasojević et al (1996 Phys. Rev. E 54 2531).