南极乔治王岛重力潮汐研究

本文应用LCR-G型重力仪在南极乔治王岛获得342天有效的重力固体潮观测资料,分析结果表明主波潮汐因子δ及相位滞后△φ的中误差小于6‰及0.3°。采用Schwiderski等潮图作海潮改正,发现M_2波受海潮影响固体潮观测幅度的20％且相位提高6.7°,获得该地区重力潮汐因子为 δ_(O_1) =1.2178±0.0061,△φ_(O_1)=2.13±0.25°, δ_(M_2)=1.2350±0.0045,△φ_(M_2)=-0.53±0.16°。     

Studies on Gravity Tides in King George Island, Antarctica

By utilizing LCR-G gravimeter, 342-day available gravity tide observations were obtained in King George Island, Antarctica. Analytical results show that mean errors of tidal factor δ and phase delay △φ for main waves are less than 0.6% and 0.3° respectively. By using the Schwiderski cotidal map to make oceanic tide correction, we discover that the effect on M_2 wave by oceanic tide reaches 20% of body tide magnitude, and leading phase is 6.7°. The obtained gravity tidal factors of this region areδ_(O_1)=1.2178±0.0061, △φ_(O_1)=2.13±0.25°,δ_(M_2)=1.2350±0.0045, △φ_(M_2)=-0.53±0.16°.     

SrRuO3导电层对快速退火制备Pb(Zr,Ti)O3薄膜结构和性能的影响

采用溶胶-凝胶法在Pt/Ti/SiO2/Si基片上,制备了Pt/Pb(Zr,Ti)O3(PZT)/Pt和SrRuO3(SRO)/PZT/SrRuO3(SRO)异质结电容器,并研究了快速退火条件下SRO导电层对PZT结构和性能的影响.XRD测试表明,两种结构电容器中的PZT薄膜均为钙钛矿结构,SRO/PZT/SRO、Pt/PZT/Pt均具有较好的铁电性和脉宽依赖性,5 V电压下两电容器的剩余极化强度Pr和矫顽电压Vc分别为28.3 μC/cm2、1.2 V和17.4 μC/cm2、2.1 V.在经过1010次翻转后,SRO/PZT/SRO铁电电容器疲劳特性相对于Pt/PZT/Pt电容器有了较大的改善,但SRO导电层的引入也带来了漏电流增大的问题.