Hg2Ru2O7, a new pyrochlore showing a metal-insulator transition

被引：35

作者：

Klein, Wilhelm ^{[1
]}

Kremer, Reinhard K. ^{[1
]}

Jansen, Martin ^{[1
]}

机构：

[1] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2007年 / 17卷 / 14期

关键词：

D O I：

10.1039/b615653c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hg2Ru2O7 was prepared by reaction of HgO and RuO2 at 400 degrees C under elevated oxygen pressure. According to a single crystal structure determination, the compound adopts the pyrochlore structure with a cubic lattice parameter of 10.2011(1) angstrom. From heat capacity measurements, a second order phase transition at 108 K was detected, consistent with a change from metallic to semiconducting behaviour as well as from paramagnetic to antiferromagnetic at lower temperatures. The behaviour is qualitatively very similar to that of Cd2Os2O7 and Tl2Ru2O7.

引用

页码：1356 / 1360

页数：5

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