Thermal stability and electric properties of Ba0.7Sr0.3TiO3 parallel plate capacitor with nano-Cr interlayer

Improvement of Electrical Properties of $\hbox{Ba}_{{\bf 0.7}}\hbox{Sr}_{\bf 0.3}\hbox{TiO}_{\bf 3}$ Capacitors With an Inserted Nano-Cr Interlayer

“…1(a). In our previous work [6], the second phase in BST/Cr(2 nm)/BST annealed in air was also found, but no second phase was appeared for BST/Cr(2 nm)/ BST annealed in N 2 atmosphere. All agree with the formation of TiO 2 from the catalyst (Cr).…”

“…Previously, nanoferroelectric-based core-shell particles have been used for improving the characteristics of the ferroelectric dielectrics [10], and nanocomposite capacitor shows the promising dielectric properties with the ceramic fillers [11]. Our previous work [6]- [8] shows that parallel plate capacitors with an inserted nano-Cr interlayer exhibit lower leakage current and more temperature stable in the dielectric constant. However, there are few papers regarding the stabilities of the capacitors with the nano-Cr interlayer as the operation temperature and the applied voltage change.…”

“…However, the stability of the BST dielectric constant becomes a major concern while the applied voltage and/or operating temperature vary. The quadratic voltage coefficient of capacitance (VCC) is a critical factor for the Manuscript received June 16, 2007; revised January 6,2008. This work was supported by the National Science Council, Taiwan, under Contract NSC 95-2221-E-009-085.…”

“…Besides, the dielectric constant of BST varies with the operating temperature [6]- [9], which affects the precise capacitance. Previously, nanoferroelectric-based core-shell particles have been used for improving the characteristics of the ferroelectric dielectrics [10], and nanocomposite capacitor shows the promising dielectric properties with the ceramic fillers [11].…”