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Dependence of coercivities on the holding time of DR stage. The inset figure shows the demagnetization curves for 15 and 20 min DR time.
Bright field TEM images of the magnets (a) after 15 min (b) and 20 min DR times. (c) Nd -edge map of the magnet after 15 min DR processing. (d) Nd -edge map of the magnet after 20 min DR processing.
HRTEM images of the magnets after (a) 15 min and (b) 20 min DR times.
3DAP analysis results of the magnet after 20 min DR processing. (a) Nd elemental map of the analyzed volume. (b) Nd and B maps of the selected volume perpendicular to the grain boundary. (c) Concentration depth profiles for Nd, Fe, B, and Co determined from the 3DAP analysis shown in (b).
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