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The synthesis, structure and properties of Hg2Os2O7

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
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), 646-650. (doi:10.1039/b109715f).

Record type: Article

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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More information

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: 08 Jan 2022 01:00

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Contributors

Author: Jonathan Reading
Author: Sergey Gordeev
Author: Mark T. Weller

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