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Investigation of applicability of extrapolation method for sample field determination in single-yoke measuring setup

“…Due to its simplicity and economical feasibility the magnetic hysteresis technique is considered to be an attractive method for this task. However, despite of the long history of the investigation, there is still no cheap, simple and stable measurement technique in use for evaluation of magnetically open samples (see reviews [1,2]). …”

“…This makes the SST method to be quite laborious and cumbrous in practical use. Therefore, there were and still are a lot of attempts to develop the SST device and to improve its precision [1,4,5]. However, there is no general understanding how it should be done.…”

Measurement of Barkhausen noise and its correlation with magnetic permeability

“…The Barkhausen and the hysteresis measurement methods are widely used procedures in laboratory investigations as well as in industrial non-destructive testing (NDT) [1][2][3][4][5][6][7][8][9][10]. However, no commonly accepted standard for the Barkhausen noise (BN) technique was established yet.…”

“…The research in laboratories proceeds in two main directions: an extension of number of the used parameters for NDT [3,5,9,12] and optimization of the magnetic examination with respect to the measurement conditions [4,6,13,14]. With recent development of digital measurement systems it became possible to investigate the BN signal in more details.…”

Measurement of the surface field on open magnetic samples by the extrapolation method

“…During the past 100 years there were many attempts to solve the problem of the magnetic field determination on the sample having an open-circuit configuration, such as sheets, bars, etc. 1,2 The simplest solution is to close the circuit by some magnetically soft yoke ͑or yokes͒ and assume that reluctances of the yoke and air gaps at the sample-yoke contacts are negligible compared with the reluctance of the sample. [1][2][3] Then the field is calculated from the current in the driving coil.…”