About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
Switching beravior of stressed Vicalloy wire
Abstract
In recent years there has been considerable interest1 in wire produced by subjecting cold-drawn Vicalloy to a schedule of stretching and twisting first developed by J. Wiegand2. Magnetization reversal in this wire occurs by a single giant Barkhausen jump, leading to a number of sensor-based applications. We show that the unusual switching behavior is due to a nearly perfect single magnetic domain running the length of the wire. This condition results from a doubly helical residual stress pattern (see figure) built into the wire by the twisting process. This stress is extremely large, causing a single-domain behavior first noted by Preisach3 and Sixtus and Tonks4 in externally stressed wires. The central region of the wire is frozen in axial tension (∼80 Kg/mm2) and twist, whereas the outer region is in compression and twist of opposite chirality. This model accounts for all of the observed properties of this wire.5 © 1979 IEEE