A grain oriented silicon steel core loss and its manufacturing method

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The present invention relates to a grain oriented electrical steel sheet having excellent core loss and to a method for manufacturing same. The electrical steel sheet according to one aspect of the present invention may have a composition comprising, by weight%, Si : 1.0 to 4.0%, Al : 0.1 to 4.0%, and a rare earth element : 0.0001 to 0.5% by the total content of the whole rare earth element.