can also be attributed to a strong increase of local demagnetizing fields (shape magnetic anisotropy) [6,23]. For
samples annealed at temperatures higher than 600 °C, in consequence of the shrinkage of the martensite regions, Hc decreases to a minimum value. Such peak behavior is not observed from the in situ magnetization measurements probably due to relaxation of the magneto-crystalline anisotropy constants with temperature.