R-T-B and R-T-B permanent magnet material alloy system for permanent magnet

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A raw material alloy for R-T-B permanent magnet of thin-sheet form comprising an R2T14B columnar crystal and an R enriched phase (R : at least one rare earth element including Y, T : Fe or Fe and at least one transition metal element other than Fe, and B : boron or boron and carbon), wherein in the alloy structure observed on any arbitrary section including the normal direction of the thin sheet, the aspect ratio is 10 or higher and the area ratio of R enriched phase whose longitudinal direction is 90±30° against the surface of the thin sheet is 30% or higher based on all the R enriched phases existing in the alloy.