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.
| Original language | English |
|---|---|
| Pages (from-to) | 213-220 |
| Number of pages | 8 |
| Journal | Journal of Solid State Chemistry |
| Volume | 176 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2003 Nov 15 |
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Keywords
- Co-based cuprates
- Electron diffraction
- Fluorite-type block
- High-resolution electron microscopy
- Superstructure
ASJC Scopus subject areas
- Inorganic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Structural order and disorder in Co-based layered cuprates CoSr 2(Y,Ce)sCu2O5+2s (s=1-3). / Nagai, T.; Awana, V. P S; Takayama-Muromachi, E.; Yamazaki, Atsushi; 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
}
TY - JOUR
T1 - Structural order and disorder in Co-based layered cuprates CoSr 2(Y,Ce)sCu2O5+2s (s=1-3)
AU - Nagai, T.
AU - Awana, V. P S
AU - Takayama-Muromachi, E.
AU - Yamazaki, Atsushi
AU - Karppinen, M.
AU - Yamauchi, H.
AU - Malik, S. K.
AU - Yelon, W. B.
AU - Matsui, Y.
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.
KW - Co-based cuprates
KW - Electron diffraction
KW - Fluorite-type block
KW - High-resolution electron microscopy
KW - Superstructure
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UR - http://www.scopus.com/inward/citedby.url?scp=0242625854&partnerID=8YFLogxK
U2 - 10.1016/S0022-4596(03)00412-2
DO - 10.1016/S0022-4596(03)00412-2
M3 - Article
VL - 176
SP - 213
EP - 220
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 1
ER -