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

Center for Advanced Microscopy and Spectroscopy

Research output: Contribution to journal › Article › peer-review

37 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

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2768906

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@article{d18b747abce948bfaffe2c04d7f0d5b1,

title = "Direct observation of oxygen stabilization in layered ferroelectric Bi3.25 La0.75 Ti3 O12",

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.",

author = "Kim, {Su Jae} and Chikako Moriyoshi and Sayaka Kimura and Yoshihiro Kuroiwa and Kenichi Kato and Masaki Takata and Yuji Noguchi and Masaru Miyayama",

note = "Funding Information: The authors thank E. Nishibori and M. Sakata for their help in the Rietveld analysis, and Y. Terado for his help during experiments at SPring-8. The SR experiments were carried out with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2006A0096, 2006A1115, 2006B0096, and 2006B1410). One of the authors (S.J.K.) acknowledges the financial support from Korea Research Foundation Grant funded by the Korean government (MOEHRD) (M01-2004-000-20159-0). ",

year = "2007",

doi = "10.1063/1.2768906",

language = "English",

volume = "91",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "6",

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TY - JOUR

T1 - Direct observation of oxygen stabilization in layered ferroelectric Bi3.25 La0.75 Ti3 O12

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

N1 - Funding Information: The authors thank E. Nishibori and M. Sakata for their help in the Rietveld analysis, and Y. Terado for his help during experiments at SPring-8. The SR experiments were carried out with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2006A0096, 2006A1115, 2006B0096, and 2006B1410). One of the authors (S.J.K.) acknowledges the financial support from Korea Research Foundation Grant funded by the Korean government (MOEHRD) (M01-2004-000-20159-0).

PY - 2007

Y1 - 2007

N2 - 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.

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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