TY - JOUR
T1 - A- and B-site modified perovskite nanosheets and their integrations into high-κ dielectric thin films
AU - Osada, Minoru
AU - Sasaki, Takayoshi
PY - 2012/1
Y1 - 2012/1
N2 - We investigated dielectric properties of perovskite nanosheets with different compositions (Ca 2-xSr xNb 3-yTa yO 10) to study the influence of A- and B-site modifications on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, the A-site modification by Sr 2+ ions causes the increase in ε r value, whereas the B-site modification with Ta 5+ ions improves leakage current characteristics and reduces permittivity value. The optimized property (ε r = 240) is obtained for Sr 2Nb 3O 10 nanosheet. We also discuss high-κ properties of Ca 2-xSr xNb 3-yTa yO 10 nanosheets by detailed investigations on first-principles calculations and interfacial structures.
AB - We investigated dielectric properties of perovskite nanosheets with different compositions (Ca 2-xSr xNb 3-yTa yO 10) to study the influence of A- and B-site modifications on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, the A-site modification by Sr 2+ ions causes the increase in ε r value, whereas the B-site modification with Ta 5+ ions improves leakage current characteristics and reduces permittivity value. The optimized property (ε r = 240) is obtained for Sr 2Nb 3O 10 nanosheet. We also discuss high-κ properties of Ca 2-xSr xNb 3-yTa yO 10 nanosheets by detailed investigations on first-principles calculations and interfacial structures.
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U2 - 10.1111/j.1744-7402.2011.00713.x
DO - 10.1111/j.1744-7402.2011.00713.x
M3 - Article
AN - SCOPUS:84855938618
SN - 1546-542X
VL - 9
SP - 29
EP - 36
JO - International Journal of Applied Ceramic Technology
JF - International Journal of Applied Ceramic Technology
IS - 1
ER -