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Direct Observation of Cationic Ordering in Double Perovskite Sr2FeReO6 Crystals

Published online by Cambridge University Press:  06 August 2013

Si-Young Choi ,
Jong Bong Lim ,
Yuichi Ikuhara ,
Danilo Suvorov  and
Jae-Ho Jeon
Si-Young Choi*
Affiliation:
Advanced Characterization and Analysis Group, Korea Institute of Materials Science, Changwon 641-831, Republic of Korea
Jong Bong Lim
Affiliation:
Nano-Functional Materials Group, Korea Institute of Materials Science, Changwon 641-831, Republic of Korea
Yuichi Ikuhara
Affiliation:
Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
Danilo Suvorov
Affiliation:
Department of Advanced Materials, Jozef Stefan Institute, Ljubljana SI-1000, Slovenia
Jae-Ho Jeon
Affiliation:
Nano-Functional Materials Group, Korea Institute of Materials Science, Changwon 641-831, Republic of Korea
*
*Corresponding author. E-mail: youngchoi@kims.re.kr
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Abstract

Two kinds of Sr2FeReO6 (SFRO) samples, pristine SFRO and Re-excess SFRO, were prepared and we visualized the local atomic structure in terms of cationic ordering in the prepared SFRO samples via high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM). HAADF-STEM results demonstrated the high degree of cationic ordering maintains in both the pristine SFRO and Re-excess SFRO samples. On the other hand, defective structures such as antiphase boundary and Re-deficient phase were observed dominantly in the pristine SFRO, and thus the poor magnetic property in the pristine SFRO is attributed to those defective structures related with the frustrated Fe/Re ordering.

Keywords

double perovskitecationic orderingscanning transmission electron microscopyhigh-angle annular dark-field
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 25 - 28
Copyright
Copyright © Microscopy Society of America 2013 

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