Domain observation of amorphous wire with large diameter for micro-sensor and micro-motor application

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Takezawa, M.^{a; *} | Wada, T.^a | Morimoto, Y.^a | Yamasaki, J.^a

Affiliations: [a] Graduate School of Engineering, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata-ku, Kitakyushu, Japan

Correspondence: [*] Corresponding author. Tel.: +81 93 884 3236; Fax: +81 93 884 3236; E-mail: [email protected]

Abstract: Domain structures of Fe-Si-B-Nb amorphous wires with a large diameter were investigated. A 10% increase of pulse output voltage due to large Barkhausen jumps in the Fe-Si-B-Nb wire at the diameter of 200 μm has been obtained which is less than expected due to decreased saturation and small domain size. Domain observation results indicate that the increase of the domain size in the inner core of the wire is important for high sensor output.

Keywords: Amorphous wire, domain structure, large Barkhausen jump, micro-motor

DOI: 10.3233/JAE-2007-773

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 189-192, 2007