Aluminum alloy sheet for magnetic disk and production method therefor, and magnetic disk using said aluminum alloy sheet for magnetic disk

An aluminum alloy sheet for a magnetic disk, comprising an aluminum alloy comprising 0.10 to 3.00 mass % of Fe, 0.003 to 1.000 mass % of Cu, 0. 005 to 1.000 mass % of Zn, and one or more elements selected from a group comprising Ti, B, and V, of which a total content is 0.005 to 0.500 mass % with a balance of Al and unavoidable impurities, wherein

• a value obtained by dividing a difference in an area ratio (%) of second phase particles between a region (A) and a region (B) by an average value of area ratios (%) of second phase particles in the regions (A) and (B) is 0.50 or less, the region (A) being a region from a sheet thickness center plane to a front surface of the sheet, and the region (B) being a region from the sheet thickness center plane to a rear surface of the sheet, and
• a distribution density of Ti-based compound particles having circle-equivalent diameters of 15to 50 μm is equal to five/mm2 or less.