Ruthenium(IV) pyrochlore oxides: Realization of novel electronic properties through substitution at A- and B-sites

被引：7

作者：

Mani, Rohini ^{[1
]}

Fischer, Michael ^{[2
]}

Joy, Joby E. ^{[1
]}

Gopalakrishnan, J. ^{[1
]}

Jansen, Martin ^{[2
]}

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

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

来源：

SOLID STATE SCIENCES | 2009年 / 11卷 / 01期

关键词：

Pyrochlores; Ruthenium oxides; Electrical properties; Magnetic properties; Ferromagnetism; Spin glass; CA; MAGNETORESISTANCE; CO;

D O I：

10.1016/j.solidstatesciences.2008.04.027

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We describe an exploratory investigation of the structure and electronic properties of new ruthenium(W) pyrochlore oxides and their manganese-substituted derivatives. Our investigations have revealed several, hitherto unreported, electronic ground states for these materials: it metallic and Pauli paramagnetic state for BiPbRu2O6.5 that turns into a semiconducting ferromagnetic spin-glass state at 50 K for BiPbRuMnO6.5; a metallic state that likely shows a charge density wave (CDW) instability at 50-225 K for Bi1.50Zn0.50Ru2O6.75 that is suppressed by manganese substitution in Bi1.50Zn0.50Ru1.75Mn0.25O6.50; and a metallic ferromagnetic spin-glass like state for Pb2Ru1.75Mn0.25O6.15. The results indeed affirm the richness of the electronic properties of ruthenium-based metal oxides. (C) 2008 Elsevier Masson SAS. All rights reserved.

引用

页码：189 / 194

页数：6

共 30 条

[1] Superconductivity in frustrated systems [J].

Aoki, H .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (03) :V1-V5

[2] Static disorder from lone-pair electrons in Bi2-xMxRu2O7-y (M=Cu, Co; x=0, 0.4) pyrochlores [J].

Avdeev, M ;

Haas, MK ;

Jorgenson, JD ;

Cava, RJ .

JOURNAL OF SOLID STATE CHEMISTRY, 2002, 169 (01) :24-34

[3] Spin ice state in frustrated magnetic pyrochlore materials [J].

Bramwell, ST ;

Gingras, MJP .

SCIENCE, 2001, 294 (5546) :1495-1501

[4] Structurally modulated magnetic properties in the A3MnRu2O9 phases (A = Ba, Ca):: The role of metal-metal bonding in perovskite-related oxides [J].

Gönen, ZS ;

Gopalakrishnan, J ;

Eichhorn, BW ;

Greene, RL .

INORGANIC CHEMISTRY, 2001, 40 (19) :4996-5000

[5] Crystal structures and magnetic order of La0.5+δA0.5-δMn0.5+εRu0.5-εO3 (A=Ca,Sr,Ba):: Possible orbital glass ferromagnetic state -: art. no. 214416 [J].

Granado, E ;

Huang, Q ;

Lynn, JW ;

Gopalakrishnan, J ;

Ramesha, K .

PHYSICAL REVIEW B, 2004, 70 (21) :1-7

[6] Geometrically frustrated magnetic materials [J].

Greedan, JE .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) :37-53

[7] Monophosphate tungsten bronzes. A new family of low-dimensional, charge-density-wave oxides [J].

Greenblatt, M .

ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (05) :219-228

[8] Robust paramagnetism in Bi2-xMxRu2O7 (M=Mn,Fe,Co,Ni,Cu) pyrochlore -: art. no. 094429 [J].

Haas, MK ;

Cava, RJ ;

Avdeev, M ;

Jorgensen, JD .

PHYSICAL REVIEW B, 2002, 66 (09)

[9] Superconductivity at 1 K in Cd2Re2O7 -: art. no. 187001 [J].

Hanawa, M ;

Muraoka, Y ;

Tayama, T ;

Sakakibara, T ;

Yamaura, J ;

Hiroi, Z .

PHYSICAL REVIEW LETTERS, 2001, 87 (18) :187001-1

[10] BAND-STRUCTURE OF METALLIC PYROCHLORE RUTHENATES BI2RU2O7 AND PB2RU2O6.5 [J].

HSU, WY ;

KASOWSKI, RV ;

MILLER, T ;

CHIANG, TC .

APPLIED PHYSICS LETTERS, 1988, 52 (10) :792-794

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