Tensile stress and low temperature influence changes in geometry of propagating domain wall in magnetic glass-coated bistable microwires

Abstract

Dynamics of magnetic domain walls in bistable glass-coated microwires under the influence of axial tensile stress and temperature are studied. Recent work dealing with domain wall geometry confirmed that increased damping of domain wall motion results in shortening of the wall. Results of further research into the effects of applied axial tensile stress and low temperature on domain wall geometry are presented. Magnetoelastic anisotropy changes in microwire samples due to applied tensile stress showed additional voltage peaks in induced signals from the pick-up coil, representing local increase in domain wall velocity. This local velocity increase appears to contradict pinning center predictions.