Governing conditions of repeatable Barkhausen noise response

The paper is devoted to the establishment of experimental conditions, which ensure the repeatability of magnetic Barkhausen noise testing in practice. For this task, the measurements were performed on open flat samples using different experimental configurations, including: different magnetization f...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2009-09, Vol.321 (18), p.2956-2962
Main Authors: Stupakov, O., Pal’a, J., Takagi, T., Uchimoto, T.
Format: Article
Language:English
Subjects:
Arrays
Barkhausen noise
Coiling
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic measurement
Magnetic non-destructive testing
Magnetization
Magnetization control
Materials science
Materials testing
Physics
Repeatability
Reproducibility
Sampling
Sensors
Surface field measurement
Waveforms
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Summary:The paper is devoted to the establishment of experimental conditions, which ensure the repeatability of magnetic Barkhausen noise testing in practice. For this task, the measurements were performed on open flat samples using different experimental configurations, including: different magnetization frequencies, sampling rates, and filter cut-off frequencies; using a sample-wrapped coil and using attached pick-up coils of various dimensions, with different lift-offs of a single yoke magnet and of the attached coil. The sample magnetization was controlled by a vertical array of three Hall sensors; their readings were extrapolated to the sample surface to precisely define its field. After analysis of the results, a scheme for an optimized sensor with a controlled field waveform was suggested to improve the measurement repeatability. The important issues of signal processing and parameter applicability were also discussed in detail.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2009.04.065