Fig. 4: Magnetic ___domain evolution, loss separation, and SEM analysis. | Nature Communications

Fig. 4: Magnetic ___domain evolution, loss separation, and SEM analysis.

From: Local adaptive insulation in amorphous powder cores with low core loss and high DC bias via ultrasonic rheomolding

Fig. 4

Magnetic ___domain evolution under the magneto-optical Kerr effect (MOKE) (a, c) and magnetic force microscopy (MFM) surface morphology (b, d) of the cold-compacted PCs (a, b) and ultrasonic rheomolding PCs (URPCs) (c, d). e Hysteresis loss, (f), eddy current loss, and (g), excess loss for the URPCs (blue) and cold-compacted PCs (gray). The insets in (e) show the rotation and arrangement of magnetic moments between the powder particles, with the red and green turning arrows indicating high and low resistances, respectively. The illustration in (g) shows diagrams of the pinning points in the magnetic ___domain. h, i SEM images of the cold-compacted PCs and URPCs.

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