1. Combinatorial approach for ferroelectric material libraries prepared by liquid source misted chemical deposition method.
- Author
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Ki Woong Kim, Mm Ku Jeon, Kwang Seok Oh, Tai Suk Kim, Yun Seok Kim, and Seong Ihi Woo
- Subjects
- *
SCANNING probe microscopy , *THIN films , *LIBRARIES , *PIEZOELECTRICITY , *FERROELECTRIC crystals - Abstract
Combinatorial approach for discovering novel functional materials in the huge diversity of chemical composition and processing conditions has become more important for breakthrough in thin film electronic and energy-conversion devices. The efficiency of combinatorial method depends on the preparation of a reliable high-density composition thin-film library. The physico-chemical properties of each sample on the library should be similar to those of the corresponding samples prepared by one-by-one conventional methods. We successfully developed the combinatorial liquid source misted chemical deposition (LSMCD) method and demonstrated its validity in screening the chemical composition of Bi3.75LaxCe0.25-xTi3O12 (BLCT) for high remanent polarization (Pr). LSMCD is a cheap promising combinatorial screening tool, It can control the composition up to ppm level and produce homogeneous multicomponent library. LSMCD method allows us to prepare BLCT thin-film library at the variation of 0.4 mol% of La. Maximum 2Pr is 35 µC/cm-2 at x = 0.21. The intensity of (117) XRD peak is quantitatively related to 2Pr. Newly developed scanning piezoelectric deformation measurement for nano-sized samples using scanning probe microscope (SPM) is also found out to be reliable for determining the relative ranking of Pr value rapidly. [ABSTRACT FROM AUTHOR]
- Published
- 2007
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