Magnetic coercive field measurement under ultrasonic mechanical excitation

Issue title: 13th International Workshop on 1&2 Dimensional Magnetic Measurement and Testing (2014)

Subtitle:

Guest editors: Carlo Appino, Cinzia Beatrice, Fausto Fiorillo and Carlo Ragusa

Article type: Research Article

Authors: Ghibaudo, Olivier | Chazal, Hervé^* | Galopin, Nicolas | Garbuio, Lauric

Affiliations: University of Grenoble Alpes, Grenoble, France

Correspondence: [*] Corresponding author: Hervé Chazal, University Grenoble Alpes, G2Elab-CNRS, F-38000 Grenoble, France. E-mail:herve.chazal@g2elab.grenoble-inp.fr

Abstract: The decrease of coercive magnetic field strength according to applied mechanical stress at audible and inaudible frequencies is investigated. To this aim, an experimental setup is introduced to both measure mechanical and magnetic behaviors. The mechanical resonant modes of a magnetic ring core sample are tracked to allow large longitudinal bendings and to reduce significantly the hysteresis loop width. Results are then set forth to show that elastic mechanical applied stress is relevant to describe the reduction of coercive field strength measured for both steady and transient states.

Keywords: Coercive field, magneto-elastic, mechanical stress, iron-cobalt

DOI: 10.3233/JAE-151989

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 48, no. 2-3, pp. 207-212, 2015