ELECTRICAL-PROPERTIES AND POLING OF BATIO3 THIN-FILMS

被引:47
作者
LU, HA
WILLS, LA
WESSELS, BW
机构
[1] NORTHWESTERN UNIV, DEPT MAT SCI & ENGN, EVANSTON, IL 60208 USA
[2] NORTHWESTERN UNIV, MAT RES CTR, EVANSTON, IL 60208 USA
关键词
D O I
10.1063/1.111375
中图分类号
O59 [应用物理学];
学科分类号
摘要
Dielectric and ferroelectric properties were measured for both highly a-axis textured and randomly oriented BaTiO3 thin films deposited on Pt coated MgO substrates via metal-organic chemical-vapor deposition. Dielectric constants on the order of epsilon approximately 10 and an absence of ferroelectric hysteresis were generally observed for the as-deposited films. Upon applying an electric field exceeding a threshold value of approximately 50-100 kV/cm across the film, both the dielectric constant and the ferroelectric hystersis were enhanced significantly as a result of poling. The dielectric constant increased to epsilon approximately 100, and the spontaneous polarization of the a-axis textured film reached P(s) greater-than-or-equal-to 15 muC/cm2. The measured dielectric and ferroelectric properties of the BaTiO3 thin films depended on the microstructure of the films.
引用
收藏
页码:2973 / 2975
页数:3
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