Dielectric characteristics of barium strontium titanate films prepared by aerosol deposition on a Cu substrate.
Polycrystalline barium strontium titanate (Ba(x)Sr(1-x)TiO(3), BST) films were directly prepared on copper substrates using an aerosol deposition method (ADM) at room temperature. Electric properties, such as the dielectric constant and tunability, were investigated as a function of the Ba content in Ba(x)Sr(1-x)TiO(3) (x = 1.0, 0.6, 0.4) films. At a frequency of 100 kHz, the dielectric constant of the as-deposited BST films were 100, 201, and 72 for x = 1.0, 0.6, and 0.4, respectively. After annealing in N(2) ambient at 500 degrees C, the dielectric constant of the films on Cu electrodes were 190, 400, and 170 at x = 1.0, 0.6, and 0.4, respectively. Moreover, the BST (x = 0.6) film showed a high tunability of 30% under an applied electric field of 300 kV cm(-1).
National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba, Ibaraki 305-8564, Japan.
Sewoong
S
Oh
Jae-Hyuk
JH
Park
Jun
J
Akedo