Development and testing of new sensors for the study of magnetic Barkhausen noise

Grum, Janez; Pecnik, Bostjan

doi:10.1504/ijmpt.2006.008986

Cited by 4 publications

(2 citation statements)

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“…The MBE signal at 10 Hz excitation was acquired by a 2 mm ferrite probe which had 1000 turns and then amplified to 40dB using a low noise amplifier with 10 4 -10 5 Hz bandwidth and monitored with a digital oscilloscope using a maximum sampling rate of 100 KHz. It should be pointed out that the utilized sensor of the Barkhausen apparatus was based on a compact type unit described in [30]. In this manner, the accuracy, sensibility, and reliability of the obtained measurements can considerably be improved.…”

Section: Methodsmentioning

confidence: 99%

“…Today, despite extensive and intensive theoretical and experimental investigations, [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], the applied stressinduced micromagnetic effects in ferromagnetic steels are complex and not yet fully understood. In general, the investigation of stress effects on polycrystalline ferromagnetic materials needs a basic reduction to a formulated set of problems solvable by detailed experimental investigations and/or mathematical analysis concerning the dynamics of domain wall motion.…”

Section: Introductionmentioning

confidence: 99%

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A Study of Stress – Induced Subtle Magnetic Changes in a Mild Steel using Barkhausen Emission-Aided Analysis Approaches

Altzoumailis

Kytopoulos

2023

Wseas Transactions on Electronics

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In this study magnetic Barkhausen emission – based approaches were used to reveal and characterize some interesting elastic stress - induced quantitative and qualitative subtle changes in the micromagnetic activity of steels. The quantitative changes consist in a multiplication of domain walls whereas the qualitative in the formation of two major modes of domain wall motion. Concerning the first kind of changes, it was shown that the experimentally obtained low limit of elastic stress at which such micromagnetic changes may occur is in reasonable agreement with existing theoretical as well as experimental results. Concerning the second kind of changes, it was shown by means of two types of distribution approach, that these two modes of wall motion may be related to the grain boundaries as well as the grain interior micromagnetic activity. In this context, it was also shown that an increase in the supplied elastic strain leads to a broadening of both distribution modes.

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Section: Methodsmentioning

confidence: 99%