Ca25Co22O56(OH)28: A layered misfit compound

T. Klimczuk; H. W. Zandbergen; N. M. van der Pers; L. Viciu; V. L. Miller; M. H. Lee; R. J. Cava

doi:10.1016/j.materresbull.2006.02.023

Ca₂₅Co₂₂O₅₆(OH)₂₈: A layered misfit compound

T. Klimczuk, H. W. Zandbergen, N. M. van der Pers, L. Viciu, V. L. Miller, M. H. Lee, R. J. Cava

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

5 Scopus citations

Abstract

The high pressure synthesis, structure and magnetic properties of Ca₂₅Co₂₂O₅₆(OH)₂₈ are reported. The compound has a misfit structure, consisting of double, square calcium oxide hydroxide rock-salt-like layers between hexagonal CoO₂ layers. The misfit compound crystallizes in the monoclinic space group C2/m, and can be characterized by the coexistence of two subsystems with common a = 4.893(5) Å, c = 8.825(9) Å and β = 95.745(8) parameters, and different b parameters: b_RS = 4.894(5) Å, and b_HEX = 2.809(3) Å, for the rock-salt and hexagonal type planes, respectively. The compound shows Curie-Weiss paramagnetism with an antiferromagnetic Weiss temperature of -43 K and a reduced Co moment. Substantial deviations from Curie-Weiss behavior are seen below 50 K with no indication of magnetic ordering. No superconductivity was observed down to a temperature of 2 K.

Original language	English (US)
Pages (from-to)	1673-1680
Number of pages	8
Journal	Materials Research Bulletin
Volume	41
Issue number	9
DOIs	https://doi.org/10.1016/j.materresbull.2006.02.023
State	Published - Sep 14 2006

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

A. Oxides
B. Chemical synthesis
C. Electron diffraction
C. X-ray diffraction

Access to Document

10.1016/j.materresbull.2006.02.023

Cite this

@article{223ec6e3faad467f911f648789230112,

title = "Ca25Co22O56(OH)28: A layered misfit compound",

abstract = "The high pressure synthesis, structure and magnetic properties of Ca25Co22O56(OH)28 are reported. The compound has a misfit structure, consisting of double, square calcium oxide hydroxide rock-salt-like layers between hexagonal CoO2 layers. The misfit compound crystallizes in the monoclinic space group C2/m, and can be characterized by the coexistence of two subsystems with common a = 4.893(5) {\AA}, c = 8.825(9) {\AA} and β = 95.745(8) parameters, and different b parameters: bRS = 4.894(5) {\AA}, and bHEX = 2.809(3) {\AA}, for the rock-salt and hexagonal type planes, respectively. The compound shows Curie-Weiss paramagnetism with an antiferromagnetic Weiss temperature of -43 K and a reduced Co moment. Substantial deviations from Curie-Weiss behavior are seen below 50 K with no indication of magnetic ordering. No superconductivity was observed down to a temperature of 2 K.",

keywords = "A. Oxides, B. Chemical synthesis, C. Electron diffraction, C. X-ray diffraction",

author = "T. Klimczuk and Zandbergen, {H. W.} and {van der Pers}, {N. M.} and L. Viciu and Miller, {V. L.} and Lee, {M. H.} and Cava, {R. J.}",

note = "Funding Information: This research was supported by the US Department of Energy, Basic Energy Sciences, Grant DE FG02-98-ER45706, and the NSF MRSEC and Solid State Chemistry programs, Grant numbers DMR-0213706 and DMR-0244254. T.K. acknowledges support from the Foundation for Polish Science.",

year = "2006",

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language = "English (US)",

volume = "41",

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TY - JOUR

T1 - Ca25Co22O56(OH)28

T2 - A layered misfit compound

AU - Klimczuk, T.

AU - Zandbergen, H. W.

AU - van der Pers, N. M.

AU - Viciu, L.

AU - Miller, V. L.

AU - Lee, M. H.

AU - Cava, R. J.

N1 - Funding Information: This research was supported by the US Department of Energy, Basic Energy Sciences, Grant DE FG02-98-ER45706, and the NSF MRSEC and Solid State Chemistry programs, Grant numbers DMR-0213706 and DMR-0244254. T.K. acknowledges support from the Foundation for Polish Science.

PY - 2006/9/14

Y1 - 2006/9/14

N2 - The high pressure synthesis, structure and magnetic properties of Ca25Co22O56(OH)28 are reported. The compound has a misfit structure, consisting of double, square calcium oxide hydroxide rock-salt-like layers between hexagonal CoO2 layers. The misfit compound crystallizes in the monoclinic space group C2/m, and can be characterized by the coexistence of two subsystems with common a = 4.893(5) Å, c = 8.825(9) Å and β = 95.745(8) parameters, and different b parameters: bRS = 4.894(5) Å, and bHEX = 2.809(3) Å, for the rock-salt and hexagonal type planes, respectively. The compound shows Curie-Weiss paramagnetism with an antiferromagnetic Weiss temperature of -43 K and a reduced Co moment. Substantial deviations from Curie-Weiss behavior are seen below 50 K with no indication of magnetic ordering. No superconductivity was observed down to a temperature of 2 K.

AB - The high pressure synthesis, structure and magnetic properties of Ca25Co22O56(OH)28 are reported. The compound has a misfit structure, consisting of double, square calcium oxide hydroxide rock-salt-like layers between hexagonal CoO2 layers. The misfit compound crystallizes in the monoclinic space group C2/m, and can be characterized by the coexistence of two subsystems with common a = 4.893(5) Å, c = 8.825(9) Å and β = 95.745(8) parameters, and different b parameters: bRS = 4.894(5) Å, and bHEX = 2.809(3) Å, for the rock-salt and hexagonal type planes, respectively. The compound shows Curie-Weiss paramagnetism with an antiferromagnetic Weiss temperature of -43 K and a reduced Co moment. Substantial deviations from Curie-Weiss behavior are seen below 50 K with no indication of magnetic ordering. No superconductivity was observed down to a temperature of 2 K.

KW - A. Oxides

KW - B. Chemical synthesis

KW - C. Electron diffraction

KW - C. X-ray diffraction

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