By analogy with electrostatic field, a simple analytic model is presented on the distribution of magnetic field inside a test material as a result of surface inspection with a magnetic probe. According to this model, the penetration depth of the magnetic field is defined and the permeability of the material at different depths is calculated. Finally, the magnetic flux inside the inspection head when placed on samples of different thicknesses is calculated and compared with experimental results.
Copyright 1993 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
American Institute of Physics
Z. J. Chen, Madhav Rao Govindaraju and David C. Jiles. "Analytic model calculation of magnetic field in a magnetic half‐space due to surface magnetic charge" Journal of Applied Physics
Vol. 73 Iss. 10 (1993) p. 6858 - 6860
Available at: http://works.bepress.com/david_jiles/120/