The magnetic Barkhausen noise (MBN) measurement method is a widely used non-destructive evaluation technique used for inspection of ferromagnetic materials. Besides other influences, the excitation yoke lift-off is a significant issue of this method deteriorating the measurement accuracy. In this paper, the lift-off effect is analysed mainly on grain oriented Fe-3%Si steel subjected to various heat treatment conditions. Based on investigation of relationship between the amplitude distribution of MBN and lift-off, an approach to suppress the lift-off effect is proposed. Proposed approach utilizes the digital feedback optimising the measurement based on the amplitude distribution of MBN. The results demonstrated that the approach can highly suppress the lift-off effect up to 2 mm.
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 P. Vourna, A. Ktena, P. E. Tsakiridis and E. Hristoforou, “An Accurate Evaluation of the Residual Stress of Welded Electrical Steels with Magnetic Barkhausen Noise”, Measurement vol. 71, 2015, pp. 31–45.
 A. Stupakov, M. Neslušan and O. Perevertov, “Detection of a Milling-Induced Surface Damage by the Magnetic Barkhausen Noise”, Journal of Magnetism and Magnetic Materials vol. 410, 2016, pp. 198–209.
 V. Moorthy, B. A. Shaw and J. T. Evans, “Evaluation of Tempering Induced Changes the Hardness Profile of Case-Carburised EN36 Steel using Magnetic Barkhausen Noise Analysis”, NDT & E International vol. 36, no. 1, 2003, pp. 43–49.
 M. Birsan, J. A. Szpunar, T. W. Krause and D. L. Atherton, “Magnetic Barkhausen Noise Study of Domain Wall Dynamics Grain Oriented 3 % Si-Fe”, IEEE Transactions on Magnetics vol. 32, no. 2, 1996, pp. 527–534.
 T. W. Krause, J. A. Szpunar and D. L. Atherton, “Anisotropic Flux Density Dependence of Magnetic Barkhausen Noise Oriented 3 % Si-Fe steel laminates”, IEEE Transactions on Magnetics vol. 39, no. 1, 2003, 562–566.
 K. Hartmann, A. J. Moses and T. Meydan, “A System for Measurement of AC Barkhausen Noise Electrical Steels”, Journal of Magnetism and Magnetic Materials 254-255, 2003, pp. 318–320.
 J. Pal’a and E. Ušák, “New Parameters in Adaptive Testing of Ferromagnetic Materials Utilising Magnetic Barkhausen Noise”, Journal of Magnetism and Magnetic Materials 402, 2016, pp. 172-177.
 O. Stupakov, “Stabilization of Barkhausen Noise Readings by Controlling a Surface Field Waveform”, Measurement Science and Technology vol. 25, no. 1, 2014, p. 15604.
 S. White, T. Krause and L. Clapham, “Control of Flux Magnetic Circuits for Barkhausen Noise Measurements”, Measurement Science and Technology vol. 18, no. 11, 2007, pp. 3501–3510.
 B. Alessandro and C. Beatrice and G. Bertotti and A. Montorsi, “Domain-wall Dynamics and Barkhausen Effect in Metallic Ferromagnetic Materials. I. Theory”, Journal of Applied Physics vol. 68, no. 6, 1990, pp. 2901–2907.
 J. Pal’a and M.Šoka, “Investigation of Two-Stage Magnetic Barkhausen Noise Measurement Method at Power Line Frequency”, Acta Physica Polonica A vol. 129, no. 3, 2016, pp. 383–387.
 J. Pal’a and J. Bydžovský, “An Alternative Method to Remove Excitation Field Interference from Magnetic Barkhausen Noise”, Journal of Magnetism and Magnetic Materials vol. 361, 2014, pp. 88–93.