首页> 外文期刊>Journal of Materials Research >Bulk-or interface-limited electrical conductions in IrO_2/(Ba,Sr)TiO_3/IrO_2 thin film capacitors
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Bulk-or interface-limited electrical conductions in IrO_2/(Ba,Sr)TiO_3/IrO_2 thin film capacitors

机译:IrO_2 /(Ba,Sr)TiO_3 / IrO_2薄膜电容器中的体或界面受限电导

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摘要

The electrical conduction behavior of sputter-grown(Ba,Sr)TiO_3 thin films having IrO_2 electrodes were studied under the assumption of a fully accumulated film having a negative space charge density of 1×10~9 cm~-3 at 25 deg. C. The negative space charge decreased the actual field strength in the film and resulted in a decreasing leakage current with increasing film thickness at a given applied field. The current conduction in a very low field, roughly less than 150 KV/cm, showed a linear current density-voltage(J-V)behavior at 25 deg. C. From that field to about 420 KV/cm, the bulk-limited Poole-Frenke mechanism controlled the overall conduction property at room temperature.
机译:假设在25°C时具有1×10〜9 cm〜-3的负空间电荷密度的完全积累膜的条件下,研究了具有IrO_2电极的溅射生长(Ba,Sr)TiO_3薄膜的导电行为。 C.负空间电荷降低了膜中的实际场强,并导致在给定的施加场中,随着膜厚度的增加,漏电流减小。在非常低的电场(大约小于150 KV / cm)中的电流传导在25度时表现出线性电流密度-电压(J-V)行为。 C.从该场到约420 KV / cm,有限体积的Poole-Frenke机构控制着室温下的整体导电性能。

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