Importance

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Abstract

In the grain-oriented electrical steel sheet according to an aspect of the present invention, a magnetic domain refinement treatment line, which is a part on which a magnetic domain refinement treatment is performed, exists in a magnetic domain control treatment lines which form an angle of 0° to 45° with respect to an orthogonal-to-rolling direction and are arranged in a rolling direction. It is preferable that the average magnetic domain width in an area, in which the magnetic domain refinement treatment line does not exist among the magnetic domain control treatment lines, and of which the length is 1 mm or more, is 500 μm or less. Alternatively it is preferable that the average magnetic domain width in an area, in which the magnetic domain refinement treatment line does not exist among the magnetic domain control treatment lines, and which includes two or more of magnetic walls, is 500 μm or less.

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First Claim