Crystallographical and morphological changes in charge-ordering transition of RFe2O4 (R: Y, Lu) investigated by transmission electron microscopy

Y. Horibe; S. Mori; N. Ikeda; K. Yoshii; H. Maeno; Y. Murakami

doi:10.1080/00150193.2021.1984762

Crystallographical and morphological changes in charge-ordering transition of RFe₂O₄ (R: Y, Lu) investigated by transmission electron microscopy

Y. Horibe, S. Mori, N. Ikeda, K. Yoshii, H. Maeno, Y. Murakami

School of Science

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

1 Citation (Scopus)

Abstract

Temperature dependence of charge-ordered crystal structures and domain structures in RFe₂O₄ (R: Y and Lu) was investigated by energy-filtered transmission electron microscopy, combined with conventional transmission electron microscopy. The presence of three-dimensional to two-dimensional charge ordering transition were observed in both YFe₂O₄ and LuFe₂O₄ on heating. Furthermore, real-space images obtained with the energy-filtered transmission electron microscopy revealed that YFe₂O₄ has less anisotropic nanometer-scale charge-ordered domains than LuFe₂O₄. These findings in RFe₂O₄ indicate the importance of the interchange interactions between Fe-O bilayers in addition to those within bilayers in the structural phase transitions associated with charge ordering in this system.

Original language	English
Pages (from-to)	20-30
Number of pages	11
Journal	Ferroelectrics
Volume	584
Issue number	1
DOIs	https://doi.org/10.1080/00150193.2021.1984762
Publication status	Published - 2021

Keywords

Bilayer ferrite
bright- and dark-field imaging
diffuse scattering
electron diffraction
energy-filtered transmission electron microscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1080/00150193.2021.1984762

Cite this

@article{f727cfef3e4042f2bacf511b31872fec,

title = "Crystallographical and morphological changes in charge-ordering transition of RFe2O4 (R: Y, Lu) investigated by transmission electron microscopy",

abstract = "Temperature dependence of charge-ordered crystal structures and domain structures in RFe2O4 (R: Y and Lu) was investigated by energy-filtered transmission electron microscopy, combined with conventional transmission electron microscopy. The presence of three-dimensional to two-dimensional charge ordering transition were observed in both YFe2O4 and LuFe2O4 on heating. Furthermore, real-space images obtained with the energy-filtered transmission electron microscopy revealed that YFe2O4 has less anisotropic nanometer-scale charge-ordered domains than LuFe2O4. These findings in RFe2O4 indicate the importance of the interchange interactions between Fe-O bilayers in addition to those within bilayers in the structural phase transitions associated with charge ordering in this system.",

keywords = "Bilayer ferrite, bright- and dark-field imaging, diffuse scattering, electron diffraction, energy-filtered transmission electron microscopy",

author = "Y. Horibe and S. Mori and N. Ikeda and K. Yoshii and H. Maeno and Y. Murakami",

note = "Funding Information: This work was supported by JSPS KAKENHI, Grant-in-Aid for Scientific Research (B) [Grant Numbers: 17H03393 and 20H02441] and partly supported by Kyushu University Advanced Characterization Platform of the Nanotechnology Platform Japan sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors would like to thank Prof. M. Ishimaru (Kyushu Institute of Technology), Prof. S.-W. Cheong (Rutgers University), and Mr. S. Higuchi (Kyushu Institute of Technology) for their experimental supports and useful discussions. The x-ray diffraction measurements and transmission-electron-microscopy observations in this study were partially performed in the Center for Instrumental Analysis (CIA), Kyushu Institute of Technology. Publisher Copyright: {\textcopyright} 2021 Taylor & Francis Group, LLC.",

year = "2021",

doi = "10.1080/00150193.2021.1984762",

language = "English",

volume = "584",

pages = "20--30",

journal = "Ferroelectrics",

issn = "0015-0193",

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T1 - Crystallographical and morphological changes in charge-ordering transition of RFe2O4 (R

T2 - Y, Lu) investigated by transmission electron microscopy

AU - Horibe, Y.

AU - Mori, S.

AU - Ikeda, N.

AU - Yoshii, K.

AU - Maeno, H.

AU - Murakami, Y.

N1 - Funding Information: This work was supported by JSPS KAKENHI, Grant-in-Aid for Scientific Research (B) [Grant Numbers: 17H03393 and 20H02441] and partly supported by Kyushu University Advanced Characterization Platform of the Nanotechnology Platform Japan sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors would like to thank Prof. M. Ishimaru (Kyushu Institute of Technology), Prof. S.-W. Cheong (Rutgers University), and Mr. S. Higuchi (Kyushu Institute of Technology) for their experimental supports and useful discussions. The x-ray diffraction measurements and transmission-electron-microscopy observations in this study were partially performed in the Center for Instrumental Analysis (CIA), Kyushu Institute of Technology. Publisher Copyright: © 2021 Taylor & Francis Group, LLC.

PY - 2021

Y1 - 2021

N2 - Temperature dependence of charge-ordered crystal structures and domain structures in RFe2O4 (R: Y and Lu) was investigated by energy-filtered transmission electron microscopy, combined with conventional transmission electron microscopy. The presence of three-dimensional to two-dimensional charge ordering transition were observed in both YFe2O4 and LuFe2O4 on heating. Furthermore, real-space images obtained with the energy-filtered transmission electron microscopy revealed that YFe2O4 has less anisotropic nanometer-scale charge-ordered domains than LuFe2O4. These findings in RFe2O4 indicate the importance of the interchange interactions between Fe-O bilayers in addition to those within bilayers in the structural phase transitions associated with charge ordering in this system.

AB - Temperature dependence of charge-ordered crystal structures and domain structures in RFe2O4 (R: Y and Lu) was investigated by energy-filtered transmission electron microscopy, combined with conventional transmission electron microscopy. The presence of three-dimensional to two-dimensional charge ordering transition were observed in both YFe2O4 and LuFe2O4 on heating. Furthermore, real-space images obtained with the energy-filtered transmission electron microscopy revealed that YFe2O4 has less anisotropic nanometer-scale charge-ordered domains than LuFe2O4. These findings in RFe2O4 indicate the importance of the interchange interactions between Fe-O bilayers in addition to those within bilayers in the structural phase transitions associated with charge ordering in this system.

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