On the best method of demagnetizing iron in magnetic testing (1908)
National Bureau of Standards · leaf 12
urrows. J Method of Demagnetizing Iron. 209 Instead of starting with a piece of virgin iron, or with a piece ofiron which had been thoroughly freed from all previous polarization,we may start with a specimen which has a residual induction repre-sented by the point P which obviously could lie… … Fig. 1.—Ideal curve to illustrate the definitions of magnetic properties. Fig. 2.—Ideal curve to illustrate the effect of previous magnetic history on the initial permeabilityof apparently neutral iron. This new center may be so far displaced from the origin that onreversals of small values of H…
Magnetism · Magnetic properties and materials
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