The synthesis, structure and properties of Hg2Os2O7
The synthesis, structure and properties of Hg2Os2O7
Hg2Os2O7 has been synthesised by direct reaction of HgO, OsO4 and Os metal at 500°C. The product adopts the pyrochlore structure, in common with Cd2Os2O7, but exhibits a slightly larger lattice parameter at 10.245 Å. The material shows a weak transition to antiferromagnetic behaviour below 88 K; the compound remains semi-metallic through this transition but with a distinct drop in resistivity again centred on 88 K. Powder neutron diffraction data, collected over the temperature range 12 K-298 K, show weak discontinuities in the structural properties at this transition. Comparisons are made with the Cd2Os2O7 and Cd2Re2O7 systems.
colossal magnetoresistance, tl2mn2o7
646-650
Reading, Jonathan
0bc0115a-8349-4f63-b975-6097db003142
Gordeev, Sergey
7899de15-43b4-4b43-b8cf-d60e754fd341
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
2002
Reading, Jonathan
0bc0115a-8349-4f63-b975-6097db003142
Gordeev, Sergey
7899de15-43b4-4b43-b8cf-d60e754fd341
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Reading, Jonathan, Gordeev, Sergey and Weller, Mark T.
(2002)
The synthesis, structure and properties of Hg2Os2O7.
Journal of Materials Chemistry, 12 (3), .
(doi:10.1039/b109715f).
Abstract
Hg2Os2O7 has been synthesised by direct reaction of HgO, OsO4 and Os metal at 500°C. The product adopts the pyrochlore structure, in common with Cd2Os2O7, but exhibits a slightly larger lattice parameter at 10.245 Å. The material shows a weak transition to antiferromagnetic behaviour below 88 K; the compound remains semi-metallic through this transition but with a distinct drop in resistivity again centred on 88 K. Powder neutron diffraction data, collected over the temperature range 12 K-298 K, show weak discontinuities in the structural properties at this transition. Comparisons are made with the Cd2Os2O7 and Cd2Re2O7 systems.
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Published date: 2002
Keywords:
colossal magnetoresistance, tl2mn2o7
Identifiers
Local EPrints ID: 19840
URI: http://eprints.soton.ac.uk/id/eprint/19840
PURE UUID: 160f8490-0343-4721-8a53-56274e6eb074
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Date deposited: 22 Feb 2006
Last modified: 15 Mar 2024 06:19
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Author:
Jonathan Reading
Author:
Sergey Gordeev
Author:
Mark T. Weller
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