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Granular Shearing and Barkhausen Noise
2007We present results from a series of experiments on a granular medium sheared in a Couette geometry and show that their statistical properties can be computed in a quantitative way from the assumption that the resultant from the set of forces acting in the system performs a Brownian motion.
Baldassarri A. +5 more
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The frequency spectrum of Barkhausen noise
Journal of Physics D: Applied Physics, 1972The spectrum of Barkhausen noise has been measured in iron and analysed using signal analysis techniques. The results suggest that the mean duration of the voltage pulses caused by the domain reversals is less than 5 × 10−5 s and that a domain reversal triggers other domain reversals with a time delay normally of 1 to 2 ms.
G Manson, G Hoffmann de Visme
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Frequency Spectrum of the Barkhausen Noise
Journal of Applied Physics, 1957The spectral density of the Barkhausen noise has been measured and a theoretical interpretation of the results is given. It is assumed that the single pulse is exponential with a time constant of the order of 10−4 second. Then the computed spectral density is constant up to 1 kcps, and then decreases exponentially.
G. Biorci, D. Pescetti
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Barkhausen noise in fluxgate magnetometers
Applied Scientific Research, 1974Barkhausen noise is one of the limiting factors for the sensitivity of fluxgate magnetometers. In order to set up calculations about Barkhausen noise, the theory of Bittel and Storm [1] had to be modified. As a result an equation for the signal-to-noise ratio is given, which gives criteria to increase the sensitivity of fluxgate magnetometers.
J. L. M. J. Bree +2 more
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Journal of Magnetism and Magnetic Materials, 1995
Abstract A one-dimensional model is studied where Bloch walls in a regular array of pinning centers interact via an exponentially decreasing next-neighbor interaction. A slowly varying uniform field leads to avalanches triggered by depinnings of single walls. The distribution of duration times follows a power law (exponent ≈ 2.6).
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Abstract A one-dimensional model is studied where Bloch walls in a regular array of pinning centers interact via an exponentially decreasing next-neighbor interaction. A slowly varying uniform field leads to avalanches triggered by depinnings of single walls. The distribution of duration times follows a power law (exponent ≈ 2.6).
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Stabilization of the Barkhausen Noise Parameters
IEEE Transactions on Magnetics, 2010The Barkhausen noise was measured in nonoriented Fe-3%Si steel with different average grain sizes. Air gaps between the yoke and the measured objects were also varied during the measurements. The change of the grain size was achieved by different combinations of cold rolling and heat treatment processes.
Jozef Pal'a +3 more
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Barkhausen noise in differential transformers
Applied Scientific Research, 1975A treatment is presented of the Barkhausen noise in differential transformers in analogy to our noise calculations on fluxgate magnetometers. A numerical estimate is given which for practical situations leads to an accuracy limit of the order of 10−10 m.
J. L. M. J. Bree +2 more
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Universality and scaling in the Barkhausen noise
SPIE Proceedings, 2003Since its discovery by Barkhausen in 1919, the jerky motion of domain walls in bulk soft magnetic materials has represented a unique tool to study the microscopical processes responsible for the magnetic hysteresis. For long time, the description of this complex motion has been purely phenomenological, without any precise connection with the ...
Durin +5 more
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Spectral damping in Barkhausen noise
IEEE Transactions on Magnetics, 1975The spectral amplitude damping of Barkhausen noise is determined theoretically and experimentally as a function of distance inside the sample itself. Power spectra for noise amplitude and its time derivative are measured in some steel specimens over a wide frequency range. Some examples of the influence of the sample microstructure on the power spectra
S. Tiitto, S. Saynajakangas
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Barkhausen Noise in thin-film recording heads
International Conference on Magnetics, 1990Barkhausen noise in thin-film heads was studied by exciting the heads with an external magnetic field and with a head-coil-generated field. Observed pulses show an exponential growth and decay, resulting in a second-order wall energy versus displacement model. Analytical expressions are given for the observed pulse shapes.
K.B. Klaassen, J.C.L. van Peppen
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