抄録
The effect of electrode materials and atmospheres on the polarization reversal and the electrical conduction of barium titanate single crystals were investigated. It was revealed From d. c. conduction measurements that evaporated indium and tellurium metals give an ohmic and a blocking contacts, respectively. It was found that the switching rate under the application of sinusoidal field is primarily determined by the anode substance and that the indium electrode markedly slows down the rate. The polarization reversal of the crystals with evaporated gold electrodes is affected considerably by atmosphere. The switching rate was decreased by evacuation and increased by the adsorption of polar molecules. The switching behavior was determined by the atmosphere in contact with anode. The condition to bring about a sharp switching required at least one blocking contact so biased that the carriers were easy to flow across it. The mechanism is discussed.
