Title :
Domain collapse in amorphous magnetostrictive wires
Author :
Panina, L.V. ; Katoh, H. ; Mizutani, M. ; Mohri, K. ; Humphrey, F.B.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
In magnetostrictive amorphous wires of composition (Fe77.5 Si7.5B15) the process of domain collapse is an important ingredient of reentrant reversal. During collapse, a narrow and high voltage pulse is generated due to the formation of an unstable domain. Experimental results showing the influence of an external magnetic field and an applied longitudinal tensile stress on the voltage pulse shape agree well with those calculated on the basis of an ellipsoidal domain model for the collapsing domain. An experiment similar to the Sixtus-Tonks experiment on a long wire was used to model a short wire in a way that is more reproducible and controllable than the self-nucleation of a free wire. The shape of this pulse has been found to change with increase of applied magnetic field or tension
Keywords :
boron alloys; ferromagnetic properties of substances; iron alloys; magnetic domain walls; magnetic properties of amorphous substances; magnetostriction; metallic glasses; silicon alloys; Fe77.5Si7.5B15 wire; Sixtus-Tonks experiment; amorphous magnetostrictive wires; applied longitudinal tensile stress; domain collapse; ellipsoidal domain model; external magnetic field; high voltage pulse; metallic glass; reentrant reversal; unstable domain; Amorphous magnetic materials; Amorphous materials; Iron; Magnetic domains; Magnetic fields; Magnetostriction; Pulse shaping methods; Shape; Voltage; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
