Low temperature phase transitions and crystal structure of Na 0.5CoO2

Q. Huang; M. L. Foo; J. W. Lynn; H. W. Zandbergen; G. Lawes; Yayu Wang; B. H. Toby; A. P. Ramirez; N. P. Ong; R. J. Cava

doi:10.1088/0953-8984/16/32/016

Low temperature phase transitions and crystal structure of Na _0.5CoO₂

Q. Huang, M. L. Foo, J. W. Lynn, H. W. Zandbergen, G. Lawes, Yayu Wang, B. H. Toby, A. P. Ramirez, N. P. Ong, R. J. Cava

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168 Scopus citations

Abstract

Specific heat measurements on Na_0.5CoO₂ show that the transitions observed at 87 and 53 K in the resistivity and magnetic susceptibility are accompanied by changes in entropy, whereas the one near 20 K is not. Electron diffraction studies suggest that the 87 K transition has a structural component. The crystal structure of Na_0.5CoO₂, determined by powder neutron diffraction, consists of layers of edge-shared CoO₆ octahedra in a triangular lattice, with Na ions occupying ordered positions in the interleaving planes. The Na ions form one-dimensional zigzag chains. Two types of Co ions are also found in chains.

Original language	English (US)
Pages (from-to)	5803-5814
Number of pages	12
Journal	Journal of Physics Condensed Matter
Volume	16
Issue number	32
DOIs	https://doi.org/10.1088/0953-8984/16/32/016
State	Published - Aug 18 2004

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics

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title = "Low temperature phase transitions and crystal structure of Na 0.5CoO2",

abstract = "Specific heat measurements on Na0.5CoO2 show that the transitions observed at 87 and 53 K in the resistivity and magnetic susceptibility are accompanied by changes in entropy, whereas the one near 20 K is not. Electron diffraction studies suggest that the 87 K transition has a structural component. The crystal structure of Na0.5CoO2, determined by powder neutron diffraction, consists of layers of edge-shared CoO6 octahedra in a triangular lattice, with Na ions occupying ordered positions in the interleaving planes. The Na ions form one-dimensional zigzag chains. Two types of Co ions are also found in chains.",

author = "Q. Huang and Foo, \{M. L.\} and Lynn, \{J. W.\} and Zandbergen, \{H. W.\} and G. Lawes and Yayu Wang and Toby, \{B. H.\} and Ramirez, \{A. P.\} and Ong, \{N. P.\} and Cava, \{R. J.\}",

year = "2004",

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doi = "10.1088/0953-8984/16/32/016",

language = "English (US)",

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TY - JOUR

T1 - Low temperature phase transitions and crystal structure of Na 0.5CoO2

AU - Huang, Q.

AU - Foo, M. L.

AU - Lynn, J. W.

AU - Zandbergen, H. W.

AU - Lawes, G.

AU - Wang, Yayu

AU - Toby, B. H.

AU - Ramirez, A. P.

AU - Ong, N. P.

AU - Cava, R. J.

PY - 2004/8/18

Y1 - 2004/8/18

N2 - Specific heat measurements on Na0.5CoO2 show that the transitions observed at 87 and 53 K in the resistivity and magnetic susceptibility are accompanied by changes in entropy, whereas the one near 20 K is not. Electron diffraction studies suggest that the 87 K transition has a structural component. The crystal structure of Na0.5CoO2, determined by powder neutron diffraction, consists of layers of edge-shared CoO6 octahedra in a triangular lattice, with Na ions occupying ordered positions in the interleaving planes. The Na ions form one-dimensional zigzag chains. Two types of Co ions are also found in chains.

AB - Specific heat measurements on Na0.5CoO2 show that the transitions observed at 87 and 53 K in the resistivity and magnetic susceptibility are accompanied by changes in entropy, whereas the one near 20 K is not. Electron diffraction studies suggest that the 87 K transition has a structural component. The crystal structure of Na0.5CoO2, determined by powder neutron diffraction, consists of layers of edge-shared CoO6 octahedra in a triangular lattice, with Na ions occupying ordered positions in the interleaving planes. The Na ions form one-dimensional zigzag chains. Two types of Co ions are also found in chains.

UR - https://www.scopus.com/pages/publications/4344668133

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U2 - 10.1088/0953-8984/16/32/016

DO - 10.1088/0953-8984/16/32/016

M3 - Article

AN - SCOPUS:4344668133

SN - 0953-8984

VL - 16

SP - 5803

EP - 5814

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 32

ER -

Low temperature phase transitions and crystal structure of Na _0.5CoO₂

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