MICROMAGNETIC ANALYSIS OF THE SMALL-ANGLE MAGNETIZATION ROTATION (SAMR) METHOD RESPONSE OF A TWISTED LOW-MAGETOSTRICTIVE WIRE

The application of the small angle magnetization rotation (SAMR) metho d to the measurement of the saturation magnetostriction of a twisted, low-magnetostrictive wire is analyzed in the framework of the micromag netic approximation. We show that the applied torsion introduces into the electric signal picked-up from a secondary coil coaxial with the w ire a fundamental harmonic contribution. Nevertheless, the measurement of saturation magnetostriction value can be performed using the same well-known SAMR formula.