Structural order and disorder in Co-based layered cuprates CoSr 2(Y,Ce)sCu2O5+2s (s=1-3)

T. Nagai; V. P.S. Awana; E. Takayama-Muromachi; A. Yamazaki; M. Karppinen; H. Yamauchi; S. K. Malik; W. B. Yelon; Y. Matsui

doi:10.1016/S0022-4596(03)00412-2

Structural order and disorder in Co-based layered cuprates CoSr ₂(Y,Ce)_sCu₂O_5+2s (s=1-3)

T. Nagai, V. P.S. Awana, E. Takayama-Muromachi, A. Yamazaki, M. Karppinen, H. Yamauchi, S. K. Malik, W. B. Yelon, Y. Matsui

School of Creative Science and Engineering

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

12 Citations (Scopus)

Abstract

Crystal structures of a homologous series of Co-based layered cuprates, CoSr₂(Y,Ce)_sCu₂O_5+2s (s=1-3), have been investigated by high-resolution electron microscopy (HREM) and electron diffraction (ED) techniques. For all the three phases ED patterns showed double periodicity along a direction parallel to the CoO layers, indicating a regular alternation of two types of CoO₄-tetrahedra chains within the layers. Also seen was ordering of the chains along the layer-stacking direction for the s=1 phase (Co-1212); ED patterns simulated based on the proposed superstructure model well reproduced the observed patterns. For the s=2 (Co-1222) and s=3 (Co-1232) phases in which an additional fluorite-type layer-block is inserted between two CuO₂ planes, HREM and ED analysis revealed complete disorder of the CoO₄ chains along the layer-stacking direction. This implies that the interlayer ordering is mainly controlled by the distance between the neighboring CoO layers.

Original language	English
Pages (from-to)	213-220
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	176
Issue number	1
DOIs	https://doi.org/10.1016/S0022-4596(03)00412-2
Publication status	Published - 2003 Nov 15

Keywords

Co-based cuprates
Electron diffraction
Fluorite-type block
High-resolution electron microscopy
Superstructure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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Structural order and disorder in Co-based layered cuprates CoSr ₂(Y,Ce)_sCu₂O_5+2s (s=1-3). / Nagai, T.; Awana, V. P.S.; Takayama-Muromachi, E.; Yamazaki, A.; Karppinen, M.; Yamauchi, H.; Malik, S. K.; Yelon, W. B.; Matsui, Y.

In: Journal of Solid State Chemistry, Vol. 176, No. 1, 15.11.2003, p. 213-220.

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

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title = "Structural order and disorder in Co-based layered cuprates CoSr 2(Y,Ce)sCu2O5+2s (s=1-3)",

abstract = "Crystal structures of a homologous series of Co-based layered cuprates, CoSr2(Y,Ce)sCu2O5+2s (s=1-3), have been investigated by high-resolution electron microscopy (HREM) and electron diffraction (ED) techniques. For all the three phases ED patterns showed double periodicity along a direction parallel to the CoO layers, indicating a regular alternation of two types of CoO4-tetrahedra chains within the layers. Also seen was ordering of the chains along the layer-stacking direction for the s=1 phase (Co-1212); ED patterns simulated based on the proposed superstructure model well reproduced the observed patterns. For the s=2 (Co-1222) and s=3 (Co-1232) phases in which an additional fluorite-type layer-block is inserted between two CuO2 planes, HREM and ED analysis revealed complete disorder of the CoO4 chains along the layer-stacking direction. This implies that the interlayer ordering is mainly controlled by the distance between the neighboring CoO layers.",

keywords = "Co-based cuprates, Electron diffraction, Fluorite-type block, High-resolution electron microscopy, Superstructure",

author = "T. Nagai and Awana, {V. P.S.} and E. Takayama-Muromachi and A. Yamazaki and M. Karppinen and H. Yamauchi and Malik, {S. K.} and Yelon, {W. B.} and Y. Matsui",

note = "Funding Information: We thank K. Kimoto, T. Asaka and C. Tsuruta for helpful discussions. This work was supported by the Nanotechnology Support Project of the MEXT, Japan. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

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AU - Nagai, T.

AU - Awana, V. P.S.

AU - Takayama-Muromachi, E.

AU - Yamazaki, A.

AU - Karppinen, M.

AU - Yamauchi, H.

AU - Malik, S. K.

AU - Yelon, W. B.

AU - Matsui, Y.

N1 - Funding Information: We thank K. Kimoto, T. Asaka and C. Tsuruta for helpful discussions. This work was supported by the Nanotechnology Support Project of the MEXT, Japan. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2003/11/15

Y1 - 2003/11/15

N2 - Crystal structures of a homologous series of Co-based layered cuprates, CoSr2(Y,Ce)sCu2O5+2s (s=1-3), have been investigated by high-resolution electron microscopy (HREM) and electron diffraction (ED) techniques. For all the three phases ED patterns showed double periodicity along a direction parallel to the CoO layers, indicating a regular alternation of two types of CoO4-tetrahedra chains within the layers. Also seen was ordering of the chains along the layer-stacking direction for the s=1 phase (Co-1212); ED patterns simulated based on the proposed superstructure model well reproduced the observed patterns. For the s=2 (Co-1222) and s=3 (Co-1232) phases in which an additional fluorite-type layer-block is inserted between two CuO2 planes, HREM and ED analysis revealed complete disorder of the CoO4 chains along the layer-stacking direction. This implies that the interlayer ordering is mainly controlled by the distance between the neighboring CoO layers.

AB - Crystal structures of a homologous series of Co-based layered cuprates, CoSr2(Y,Ce)sCu2O5+2s (s=1-3), have been investigated by high-resolution electron microscopy (HREM) and electron diffraction (ED) techniques. For all the three phases ED patterns showed double periodicity along a direction parallel to the CoO layers, indicating a regular alternation of two types of CoO4-tetrahedra chains within the layers. Also seen was ordering of the chains along the layer-stacking direction for the s=1 phase (Co-1212); ED patterns simulated based on the proposed superstructure model well reproduced the observed patterns. For the s=2 (Co-1222) and s=3 (Co-1232) phases in which an additional fluorite-type layer-block is inserted between two CuO2 planes, HREM and ED analysis revealed complete disorder of the CoO4 chains along the layer-stacking direction. This implies that the interlayer ordering is mainly controlled by the distance between the neighboring CoO layers.

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