Synthesis, Crystal Structure, and Electronic Properties of High-Pressure PdF2-Type Oxides MO2 (M = Ru, Rh, Os, Ir, Pt)

被引：22

作者：

Shirako, Yuichi ^{[1
]}

Wang, Xia ^{[2
]}

Tsujimoto, Yoshihiro ^{[3
]}

Tanaka, Kie ^{[1
]}

Guo, Yanfeng ^{[2
]}

Matsushita, Yoshitaka ^{[4
]}

Nemoto, Yoshihiro ^{[5
]}

Katsuya, Yoshio ^{[4
]}

Shi, Youguo ^{[2
,6
]}

Mori, Daisuke ^{[1
]}

Kojitani, Hiroshi ^{[1
]}

Yamaura, Kazunari ^{[2
,7
]}

Inaguma, Yoshiyuki ^{[1
]}

Akaogi, Masaki ^{[1
]}

机构：

[1] Gakushuin Univ, Dept Chem, Toshima Ku, Tokyo 1718588, Japan

[2] Natl Inst Mat Sci, Superconducting Properties Unit, Tsukuba, Ibaraki 3050044, Japan

[3] Natl Inst Mat Sci, Mat Proc Unit, Tsukuba, Ibaraki 3050044, Japan

[4] Natl Inst Mat Sci, NIMS Beamline Stn SPring 8, Mikazuki, Hyogo 6795148, Japan

[5] Natl Inst Mat Sci, Res Network & Facil Serv Div, Tsukuba, Ibaraki 3050047, Japan

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[7] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo, Hokkaido 0600810, Japan

来源：

INORGANIC CHEMISTRY | 2014年 / 53卷 / 21期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

PYRITE-STRUCTURE; MAGNETIC-PROPERTIES; 3-DIMENSIONAL VISUALIZATION; ELECTRICAL-PROPERTIES; DICHALCOGENIDES; PEROXIDE; PHASE; TRANSITIONS; DISULFIDES; REFINEMENT;

D O I：

10.1021/ic501770g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The polycrystalline MO2's (HP-PdF2-type MO2, M = Rh, Os, Pt) with high-pressure PdF2 compounds were successfully synthesized under high-pressure conditions for the first time, to the best of our knowledge. The crystal structures and electromagnetic properties were studied. Previously unreported electronic properties of the polycrystalline HP-PdF2-type RuO2 and IrO2 were also studied. The refined structures clearly indicated that all compounds crystallized into the HP-PdF2-type structure, M4+O22-, rather than the pyrite-type structure, Mn+(O-2)(n-) (n < 4). The MO2 compounds (M = Ru, Rh, Os, Ir) exhibited metallic conduction, while PtO2 was highly insulating, probably because of the fully occupied t2g band. Neither superconductivity nor a magnetic transition was detected down to a temperature of 2 K, unlike the case of 3d transition metal chalcogenide pyrites.

引用

页码：11616 / 11625

页数：10

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