Transmission electron microscopy study of domain structures in ferroelectric SrBi2Nb2O9 ceramics

C. Karthik; K. B.R. Ravishankar; Varma

Transmission electron microscopy study of domain structures in ferroelectric SrBi₂Nb₂O₉ ceramics

C. Karthik
, K. B.R. Ravishankar
, Varma

Research output: Contribution to journal › Conference article › peer-review

Abstract

A transmission electron microscopy study has been carried out on the domain structures of SrBi₂Nb₂O₉ (SBN) ferroelectric ceramics which belong to the Aurivillius family of bismuth layered perovskite oxides. SBN is a potential candidate for Ferroelectric Random access memory (FeRAM) applications. The 90° ferroelectric domains and antiphase boundaries (APBs) were identified with dark field imaging techniques using different superlattice reflections which arise as a consequence of octahedral rotations and cationic shifts. The 90° domain walls are irregular in shape without any faceting. The antiphase boundaries are less dense compared to that of SrBi ₂Ta₂O₉ (SBT). The electron microscopy observations are correlated with the polarization fatigue nature of the ceramic where the domain structures possibly play a key role in the fatigue-free behavior of the Aurivillius family of ferroelectric oxides.

Original language	English
Article number	P3.10
Pages (from-to)	67-72
Number of pages	6
Journal	Materials Research Society Symposium Proceedings
Volume	839
State	Published - 2005
Externally published	Yes
Event	2004 MRS Fall Meeting - Boston, MA, United States Duration: 28 Nov 2004 → 3 Dec 2004

Cite this

@article{bd1a7e9af6d74d53b75705ba6a18c86b,

title = "Transmission electron microscopy study of domain structures in ferroelectric SrBi2Nb2O9 ceramics",

abstract = "A transmission electron microscopy study has been carried out on the domain structures of SrBi2Nb2O9 (SBN) ferroelectric ceramics which belong to the Aurivillius family of bismuth layered perovskite oxides. SBN is a potential candidate for Ferroelectric Random access memory (FeRAM) applications. The 90° ferroelectric domains and antiphase boundaries (APBs) were identified with dark field imaging techniques using different superlattice reflections which arise as a consequence of octahedral rotations and cationic shifts. The 90° domain walls are irregular in shape without any faceting. The antiphase boundaries are less dense compared to that of SrBi 2Ta2O9 (SBT). The electron microscopy observations are correlated with the polarization fatigue nature of the ceramic where the domain structures possibly play a key role in the fatigue-free behavior of the Aurivillius family of ferroelectric oxides.",

author = "C. Karthik and Ravishankar, \{K. B.R.\} and Varma",

year = "2005",

language = "English",

volume = "839",

pages = "67--72",

journal = "Materials Research Society Symposium Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "2004 MRS Fall Meeting ; Conference date: 28-11-2004 Through 03-12-2004",

}

TY - JOUR

T1 - Transmission electron microscopy study of domain structures in ferroelectric SrBi2Nb2O9 ceramics

AU - Karthik, C.

AU - Ravishankar, K. B.R.

AU - Varma,

PY - 2005

Y1 - 2005

N2 - A transmission electron microscopy study has been carried out on the domain structures of SrBi2Nb2O9 (SBN) ferroelectric ceramics which belong to the Aurivillius family of bismuth layered perovskite oxides. SBN is a potential candidate for Ferroelectric Random access memory (FeRAM) applications. The 90° ferroelectric domains and antiphase boundaries (APBs) were identified with dark field imaging techniques using different superlattice reflections which arise as a consequence of octahedral rotations and cationic shifts. The 90° domain walls are irregular in shape without any faceting. The antiphase boundaries are less dense compared to that of SrBi 2Ta2O9 (SBT). The electron microscopy observations are correlated with the polarization fatigue nature of the ceramic where the domain structures possibly play a key role in the fatigue-free behavior of the Aurivillius family of ferroelectric oxides.

AB - A transmission electron microscopy study has been carried out on the domain structures of SrBi2Nb2O9 (SBN) ferroelectric ceramics which belong to the Aurivillius family of bismuth layered perovskite oxides. SBN is a potential candidate for Ferroelectric Random access memory (FeRAM) applications. The 90° ferroelectric domains and antiphase boundaries (APBs) were identified with dark field imaging techniques using different superlattice reflections which arise as a consequence of octahedral rotations and cationic shifts. The 90° domain walls are irregular in shape without any faceting. The antiphase boundaries are less dense compared to that of SrBi 2Ta2O9 (SBT). The electron microscopy observations are correlated with the polarization fatigue nature of the ceramic where the domain structures possibly play a key role in the fatigue-free behavior of the Aurivillius family of ferroelectric oxides.

UR - https://www.scopus.com/pages/publications/23844466264

M3 - Conference article

AN - SCOPUS:23844466264

SN - 0272-9172

VL - 839

SP - 67

EP - 72

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

M1 - P3.10

T2 - 2004 MRS Fall Meeting

Y2 - 28 November 2004 through 3 December 2004

ER -

Transmission electron microscopy study of domain structures in ferroelectric SrBi₂Nb₂O₉ ceramics

Abstract

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