NaNO_2における強誘電性分域のはみ出し速度

概要

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The "Hamidashi effect" of the domain in NaN0_2 was clearly revealed by a toner of the maenetic brush development in electrophotography without giving any damages on electrodes As the toner is made of carbon partides with plus charge, it is attracted to minus side of polarizatio on surface. The patterns of domai boundaries at 120℃, 130℃, 140℃ and 150℃ visuarized by above method were observed by microscopic photographs, when new domains have been bulging out or electrode to poled crystal. The average length of Hamidashi were plotted against the total time for applied field. They vary verv fast with time by about three minutes and then they change linearly with low speed. It seems that in the former Part the domain reversal occurs by the promotion of electric line of force leaked from electrodes and in the later one the boundary moves by the action of the true charge drived on the surface. The preliminary measurements for the DC surface resistivity give the suggestion for the reason that the speed of domain reversal for the a direction is faster than the c one.
東京工芸大学の論文