Direct observation of oxygen stabilization in layered ferroelectric Bi3.25 La0.75 Ti3 O12

Su Jae Kim; Chikako Moriyoshi; Sayaka Kimura; Yoshihiro Kuroiwa; Kenichi Kato; Masaki Takata; Yuji Noguchi; Masaru Miyayama

doi:10.1063/1.2768906

Direct observation of oxygen stabilization in layered ferroelectric Bi3.25 La0.75 Ti3 O12

Su Jae Kim, Chikako Moriyoshi, Sayaka Kimura, Yoshihiro Kuroiwa, Kenichi Kato, Masaki Takata, Yuji Noguchi, Masaru Miyayama

Research output: Contribution to journal › Article

36 Citations (Scopus)

Abstract

Electron charge density distributions in layered ferroelectrics Bi4 Ti3 O12 (BiT) and Bi3.25 La0.75 Ti3 O12 (BLT) are investigated by analyzing high-energy synchrotron-radiation powder diffraction data using the maximum entropy method/Rietveld method. BiT shows that chemical bonding resulting from orbital hybridization is established between Bi-O in the perovskite layer only along the a axis, whereas BLT exhibits isotropic chemical bonding of BiLa-O with a high electron density both along the a and b axes. High endurance to polarization fatigue reported for BLT films is suggested to originate from the stabilization of oxygen in the perovskite layer due to the isotropic chemical bonding of BiLa-O.

Original language	English
Article number	062913
Journal	Applied Physics Letters
Volume	91
Issue number	6
DOIs	https://doi.org/10.1063/1.2768906
Publication status	Published - 2007 Aug 17
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Kim, S. J., Moriyoshi, C., Kimura, S., Kuroiwa, Y., Kato, K., Takata, M., Noguchi, Y., & Miyayama, M. (2007). Direct observation of oxygen stabilization in layered ferroelectric Bi3.25 La0.75 Ti3 O12. Applied Physics Letters, 91(6), [062913]. https://doi.org/10.1063/1.2768906

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abstract = "Electron charge density distributions in layered ferroelectrics Bi4 Ti3 O12 (BiT) and Bi3.25 La0.75 Ti3 O12 (BLT) are investigated by analyzing high-energy synchrotron-radiation powder diffraction data using the maximum entropy method/Rietveld method. BiT shows that chemical bonding resulting from orbital hybridization is established between Bi-O in the perovskite layer only along the a axis, whereas BLT exhibits isotropic chemical bonding of BiLa-O with a high electron density both along the a and b axes. High endurance to polarization fatigue reported for BLT films is suggested to originate from the stabilization of oxygen in the perovskite layer due to the isotropic chemical bonding of BiLa-O.",

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AU - Kim, Su Jae

AU - Moriyoshi, Chikako

AU - Kimura, Sayaka

AU - Kuroiwa, Yoshihiro

AU - Kato, Kenichi

AU - Takata, Masaki

AU - Noguchi, Yuji

AU - Miyayama, Masaru

PY - 2007/8/17

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AB - Electron charge density distributions in layered ferroelectrics Bi4 Ti3 O12 (BiT) and Bi3.25 La0.75 Ti3 O12 (BLT) are investigated by analyzing high-energy synchrotron-radiation powder diffraction data using the maximum entropy method/Rietveld method. BiT shows that chemical bonding resulting from orbital hybridization is established between Bi-O in the perovskite layer only along the a axis, whereas BLT exhibits isotropic chemical bonding of BiLa-O with a high electron density both along the a and b axes. High endurance to polarization fatigue reported for BLT films is suggested to originate from the stabilization of oxygen in the perovskite layer due to the isotropic chemical bonding of BiLa-O.

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