Improvement in dielectric and tunable properties of Fe-doped Ba0.6Sr0.4TiO3 thin films grown by pulsed-laser deposition.
Fe-doped Ba(0.6)Sr(0.4)TiO3 (BST) thin films were prepared on Pt/Si substrates by the pulsed-laser deposition method. The concentrations of Fe dopants vary from 0.1 mol% to 1.0 mol%. Our results indicate that a certain amount of Fe dopants can decrease the dielectric loss of BST thin films without causing the significant reduction of the tunability. The leakage current of BST thin films also was reduced by the addition of Fe dopants. BST thin films doped with 0.3 mol% Fe ions show a minimum dielectric loss of 0.88% at 10(6) Hz, which is 1.7% for the undoped BST films. Moreover, the 0.3 mol% Fe-doped BST films reveal a maximum figure of merit (FOM) of 51, indicating the improved comprehensive dielectric and tunable properties.
Gong
Jia
J
Department of Material Science and Engineering, Shanghai University, P.R. China.
Cheng
Jinrong
J
Zhu
Weicheng
W
Yu
Shengwen
S
Wu
Wenbiao
W
Meng
Zhongyan
Z
D002516:Ceramics / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D007501:Iron / Q000737:chemistry*; D007834:Lasers; D008422:Materials Testing; D008567:Membranes, Artificial
D008567:Membranes, Artificial; D007501:Iron