Abstract
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.
Original language | English |
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Pages (from-to) | 1641-1644 |
Number of pages | 4 |
Journal | Physica Status Solidi (B) Basic Research |
Volume | 241 |
Issue number | 7 |
DOIs | |
State | Published - Jun 2004 |