Abstract
The effects of La content on crystal structure and ferroelectric property of La-substituted Bi4-xLaxTi3O12 were investigated. We utilized as-deposited thin films prepared on (111)Pt/SiO2/Si substrates at 680 °C by metalorganic chemical vapor deposition. The films showed (117) preferred orientation, and the lattice spacing of the (117) plane increased with increasing La content. With the aid of Raman spectroscopy, we found a pronounced site selectivity of La ions for the Bi site (A site) in the pseudoperovskite layer. Even for a small content (x=0.2), an incorporation of La ion into the pseudoperovskite layer greatly enhanced both remanent polarization and coercive field, but improved properties were almost irrespective of La content for x>0.2. For (Bi3.27La0.73)Ti3O12 thin film, we confirmed a good fatigue endurance up to 2×1010 switching cycles.
| Original language | English |
|---|---|
| Pages (from-to) | 6533-6535 |
| Number of pages | 3 |
| Journal | Journal of Applied Physics |
| Volume | 90 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2001 Dec 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
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Site definition and characterization of La-substituted Bi4Ti3O12 thin films prepared by metalorganic chemical vapor deposition. / Watanabe, Takayuki; Funakubo, Hiroshi; Mizuhira, Manabu; Osada, Minoru.
In: Journal of Applied Physics, Vol. 90, No. 12, 15.12.2001, p. 6533-6535.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Site definition and characterization of La-substituted Bi4Ti3O12 thin films prepared by metalorganic chemical vapor deposition
AU - Watanabe, Takayuki
AU - Funakubo, Hiroshi
AU - Mizuhira, Manabu
AU - Osada, Minoru
PY - 2001/12/15
Y1 - 2001/12/15
N2 - The effects of La content on crystal structure and ferroelectric property of La-substituted Bi4-xLaxTi3O12 were investigated. We utilized as-deposited thin films prepared on (111)Pt/SiO2/Si substrates at 680 °C by metalorganic chemical vapor deposition. The films showed (117) preferred orientation, and the lattice spacing of the (117) plane increased with increasing La content. With the aid of Raman spectroscopy, we found a pronounced site selectivity of La ions for the Bi site (A site) in the pseudoperovskite layer. Even for a small content (x=0.2), an incorporation of La ion into the pseudoperovskite layer greatly enhanced both remanent polarization and coercive field, but improved properties were almost irrespective of La content for x>0.2. For (Bi3.27La0.73)Ti3O12 thin film, we confirmed a good fatigue endurance up to 2×1010 switching cycles.
AB - The effects of La content on crystal structure and ferroelectric property of La-substituted Bi4-xLaxTi3O12 were investigated. We utilized as-deposited thin films prepared on (111)Pt/SiO2/Si substrates at 680 °C by metalorganic chemical vapor deposition. The films showed (117) preferred orientation, and the lattice spacing of the (117) plane increased with increasing La content. With the aid of Raman spectroscopy, we found a pronounced site selectivity of La ions for the Bi site (A site) in the pseudoperovskite layer. Even for a small content (x=0.2), an incorporation of La ion into the pseudoperovskite layer greatly enhanced both remanent polarization and coercive field, but improved properties were almost irrespective of La content for x>0.2. For (Bi3.27La0.73)Ti3O12 thin film, we confirmed a good fatigue endurance up to 2×1010 switching cycles.
UR - http://www.scopus.com/inward/record.url?scp=0035894081&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035894081&partnerID=8YFLogxK
U2 - 10.1063/1.1417988
DO - 10.1063/1.1417988
M3 - Article
VL - 90
SP - 6533
EP - 6535
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 12
ER -