On the study of coercivity and interaction field distributions from microhysteresis loops

We report direct measurement of the asymmetrical behaviors of microhysteresis loops within an area element at submicron scale on magnetic thin-film material. We have investigated the effect of asymmetrical behaviors created by the neighboring magnetic elements both at micron scale and submicron scale. Our studies provide evidence of the asymmetrical behaviors of microhysteresis due to the interaction field of nearby magnetic elements. Moreover, we have found that the discrepancy between H_L and H_R is larger for smaller measured areas.