Contact ferroelectric effect applied to plastic flow

Abstract

Investigations made on the ferroelectric effect of manganese dioxide show that a phenomenon, dependent on the efficiency of contact of the oxide surface with the electrodes, exists. The apparent changes in the ferroelectric hysteresis loops with pressure on the electrodes are traced experimentally. The apparent contact variation of the ferroelectric effect in manganese dioxide is applied to a comparison of the plastic flows in indentations in metals, the indentations being made by the Vickers hardness diamond pyramid.