J. Phys. IV France 08 (1998) Pr2-539-Pr2-542
Magnetomechanical behaviour in GO and NO Fe3%Si alloysD.W. Shin1, J. Degauque2 and B. Astie1
1 Laboratoire de la Matière Condensée, INSA, UMR-CNRS, 31077 Toulouse, France
2 INSA, Département de Physique, Complexe Scientifique de Rangueil, 31077 Toulouse cedex, France
Magnetomechanical damping (MMD) and mechanical Barkhausen noise power (MBP) of NO and GO Fe-3%Si strips under torsional stress (frequency = 1Hz) are studied as a function of the major axis direction with respect to the rolling direction (θ = 0°, 23°, 45°, 55°, 67°, 90°). For all orientations, NO strips show a relatively high MMD while MBP is always small ; for GO strips, only θ = 55 ° gives significative magnetomechanical effects showing the participation of 90° domain walls which should perform large Barkhausen discontinuities. These magnetomechanical effects are signifïcantly influenced by the glass film on the GO strip surfaces.
© EDP Sciences 1998