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Investigation of core loss characteristics of 3% SiFe using the laser scribing method
Author(s) -
Ahn Seungjoon,
Kim DaeWook,
Kim Ho Seob,
Baik KwangHyun,
Ahn Seong Joon,
Kim CheolGi
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304512
Subject(s) - materials science , laser , core (optical fiber) , permeability (electromagnetism) , refining (metallurgy) , silicon , optics , optoelectronics , composite material , metallurgy , chemistry , physics , biochemistry , membrane
The core loss of 3% SiFe is strongly dependent on silicon content, impurities, permeability, and domain structure of the SiFe. Domain refining has proved to be a very good method for the reduction of core loss in high‐permeability grain‐oriented SiFe, and laser scribing is well known as an effective and industrially important method of domain refinement. In this work, magnetic domain refinement was carried out using a pulsed and Q‐switched Nd:YAG laser, and the core losses were measured and analysed to find the optimal parameters of the laser treatment. The laser beam was focused with a spot size of 0.2 mm and pulse energy of 15–30 mJ and the lines were scribed with a period of ∼5 mm. The core loss was improved by up to 18% in 3% SiFe using this method, and the loss was relatively insensitive to the optical energy of the Q‐switched pulse. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)