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
基金
日本学术振兴会; 日本科学技术振兴机构;
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
收藏
页码:11616 / 11625
页数:10
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