【摘要】 研究了在不同温度区间氧气氛和氮气氛退火后处理对Pt Ba0 .8Sr0 .2 TiO3 Pt介电特性的影响 .经过高温 5 5 0℃氮气退火处理后 ,再放入 35 0℃的氧气中退火 ,发现样品的介电特性出现了非常明显的低频弛豫现象 ,并且这种低频弛豫现象在 35 0℃的氮气中退火后将会消失 .通过在出现低频弛豫现象的样品的上下电极加一偏压 ,可以发现低频弛豫现象更加明显 ,并且在撤消偏压后这种增强将会逐渐减弱 ,直至最终恢复到偏压前的弛豫状态更多还原

【Abstract】 Obvious dielectric relaxation in the low frequency region were found after the as deposited Pt/BST/Pt capacitors were first post annealed in nitrogen at 550℃ and next in oxygen at 350℃. Moreover, such a low frequency dielectric relaxation disappeared after a third time post annealing in nitrogen at 350℃. The dielectric relaxation was both enhanced with negative or positive dc bias and reduced slowly to the original state after the dc bias was turned off.更多还原