CAST RARE EARTH-CONTAINING ALLOY SHEET, MANUFACTURING METHOD THEREFOR, AND SINTERED MAGNET

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Provided are : a cast rare earth-containing alloy sheet useful in manufacturing a sintered magnet in which both excellent Br and HcJ can be established in a well-balanced manner according to Dy and/or Tb content; and a sintered magnet using same. This cast rare earth-containing alloy sheet is a R-TM-A-M-type cast alloy sheet : which has a specific composition and has an organizational structure with Nd2Fe14B main phases and grain boundary phases; and in which the Fe amount in the grain boundary phases is 10 mass% or less and the ratio of the total Dy and Tb content (b) in the grain boundary phases to the total Dy and Tb content (a) in the main phases is greater than 1.0. The cast alloy sheet is useful as a sintered magnet material.