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Effective field varies monotonically with stresses , , , , , 0, 20, and on mild nickel steel; positive in tension, negative in compression, and zero at the compression crossover. The Brown micromagnetic stress field changes coercivity and the Bozorth field changes remanence.
Bozorth’s antisymmetric stress field displays the Villari reversal near remanence and Brown’s symmetric stress field vanishes as domain walls are annihilated. Peaks may represent maximum contribution from 90° domain walls.
Browns and Bozorths stress fields are nonlinear in stress due to changes in domain structure. Magnetostriction and stress field slope are of their unstressed values for large compression, discontinuous at zero stress, and zero at large tension.
Stress modulation of remanence is discontinuous due to domain structure changes from compression to tension at zero magnetic field. Residual stress can be determined from this plot.
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