Title of article
Ca25Co22O56(OH)28: A layered misfit compound
Author/Authors
Klimczuk، نويسنده , , T. and Zandbergen، نويسنده , , H.W. and van der Pers، نويسنده , , N.M. and Viciu، نويسنده , , L. and Miller، نويسنده , , V.L. and Lee، نويسنده , , M.-H. and Cava، نويسنده , , R.J.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
8
From page
1673
To page
1680
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: 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.
Keywords
C. X-ray diffraction , A. Oxides , B. Chemical synthesis , C. Electron diffraction
Journal title
Materials Research Bulletin
Serial Year
2006
Journal title
Materials Research Bulletin
Record number
2097894
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