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Unique correlation between non-linear distortion of tangential magnetic field and magnetic excitation voltage – Unexplored ferromagnetic phenomena and their application for ferromagnetic materials evaluation

Lookup NU author(s): Dr Moorthy Vaidhianathasamy



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Unexplored ferromagnetic phenomena of non-linear distortion of tangential magnetic field (HT) and that of excitation voltage (VE) across the electromagnetic (EM) yoke, in the presence of a ferromagnetic material between the poles of the EM yoke, have been uniquely correlated in this study. Both the HT and VE show similar distortion behaviour, but in the opposite direction, with unique shape for each ferro- magnetic sample with different microstructural conditions. Interestingly unique correlation between (dVE/dt) and (dHT/dt) profiles and their ability to distinguish different magnetisation behaviour of ferromagnetic material with different microstructures have also been discussed in this study. One to one correlation between the distortion of HT and VE shown in this study is clear evidence that both these parameters are strongly influenced by the same mechanism of magnetisation process, but in different ways. The systematic changes in the height and position of the peak and the trough on the time derivative profiles of VE and HT reflect the subtle differences in the magnetisation process for each micro- structural condition of the steel. This study reveals the new scientific insight and good potential of this novel as well as very simple approach of distortion analysis of HT and VE for understanding the influence of material properties on the mechanism of magnetisation process and also their suitability for variety of applications related to materials evaluation of ferromagnetic components and structures.

Publication metadata

Author(s): Moorthy V

Publication type: Article

Publication status: Published

Journal: Journal of Magnetism and Magnetic Materials

Year: 2016

Volume: 398

Pages: 101-108

Print publication date: 15/01/2016

Online publication date: 11/09/2015

Acceptance date: 07/09/2015

Date deposited: 17/09/2015

ISSN (print): 0304-8853

ISSN (electronic): 1873-4766

Publisher: Elsevier


DOI: 10.1016/j.jmmm.2015.09.029


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