Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore.

doi:https://doi.org/10.1103/PhysRevB.66.094429

Title: Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore.

Full Record
Other Related Research

Abstract

We report magnetic susceptibility, resistivity, and Seebeck coefficients for Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} pyrochlore. The solid solution exists up to x=0.5 for M=Cu,Ni,Co and up to x=0.1 for M=Fe,Mn. The doped materials do not exhibit ferromagnetism or any localized ruthenium moment behavior. Instead we find the Ru-O and Bi-O sublattices to be essentially independent, with any magnetism resulting from the unpaired first-row transition metal dopant spins. Cobalt substitution for bismuth results in localized Co{sup 2+} and low-temperature spin-glass transitions in several cases. Nickel moments on the pyrochlore lattice display properties intermediate to localized and itinerant. Finally, copper doping results in an enhancement of the Pauli metallic density of states.

Authors:: Haas, M K; Cava, R J; Avdeev, M; Jorgensen, J D

Publication Date:: 2002-09-01

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC); National Science Foundation (NSF)

OSTI Identifier:: 949688

Report Number(s):: ANL/MSD/JA-43313
Journal ID: ISSN 0163-1829; PRBMDO; TRN: US201012%%468

DOE Contract Number:: DE-AC02-06CH11357

Resource Type:: Journal Article

Journal Name:: Phys. Rev.B

Additional Journal Information:: Journal Volume: 66; Journal Issue: Sep. 1, 2002; Journal ID: ISSN 0163-1829

Country of Publication:: United States

Language:: ENGLISH

Subject:: 36 MATERIALS SCIENCE; BISMUTH; COBALT; COPPER; DOPED MATERIALS; FERROMAGNETISM; MAGNETIC SUSCEPTIBILITY; MAGNETISM; NICKEL; PARAMAGNETISM; PYROCHLORE; RUTHENIUM; SOLID SOLUTIONS; TRANSITION ELEMENTS

Citation Formats


                    Haas, M K, Cava, R J, Avdeev, M, Jorgensen, J D, Materials Science Division, and Princeton Univ. Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore..  United States: N. p., 2002. 
        Web.  doi:10.1103/PhysRevB.66.094429.

Copy to clipboard


                    Haas, M K, Cava, R J, Avdeev, M, Jorgensen, J D, Materials Science Division, & Princeton Univ. Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore..  United States.  https://doi.org/10.1103/PhysRevB.66.094429

Copy to clipboard


                    Haas, M K, Cava, R J, Avdeev, M, Jorgensen, J D, Materials Science Division, and Princeton Univ. Sun .  
        "Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore.".  United States.  https://doi.org/10.1103/PhysRevB.66.094429.

Copy to clipboard


                    
@article{osti_949688,

  title        = {Robust paramagnetism in Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} (M = Mn,Fe,Co,Ni,Cu) pyrochlore.},

  author       = {Haas, M K and Cava, R J and Avdeev, M and Jorgensen, J D and Materials Science Division and Princeton Univ.},

  abstractNote = {We report magnetic susceptibility, resistivity, and Seebeck coefficients for Bi{sub 2-x}M{sub x}Ru{sub 2}O{sub 7} pyrochlore. The solid solution exists up to x=0.5 for M=Cu,Ni,Co and up to x=0.1 for M=Fe,Mn. The doped materials do not exhibit ferromagnetism or any localized ruthenium moment behavior. Instead we find the Ru-O and Bi-O sublattices to be essentially independent, with any magnetism resulting from the unpaired first-row transition metal dopant spins. Cobalt substitution for bismuth results in localized Co{sup 2+} and low-temperature spin-glass transitions in several cases. Nickel moments on the pyrochlore lattice display properties intermediate to localized and itinerant. Finally, copper doping results in an enhancement of the Pauli metallic density of states.},

  doi          = {10.1103/PhysRevB.66.094429},

  url          = {https://www.osti.gov/biblio/949688},
  journal      = {Phys. Rev.B},

  issn         = {0163-1829},

  number       = Sep. 1, 2002,

  volume       = 66,

  place        = {United States},

  year         = {2002},

  month        = {9}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1103/PhysRevB.66.094429

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Pyrochlore phases in Bi/sub 2-x/M/sub x/Ru/sub 2-y/Ir/sub y/O/sub 7-z/ (M = Mg, Ca, Sr, Co, Cu) systems

Journal Article Beck, E ; Kemmler-Sack, S - Mater. Res. Bull.; (United States)

New pyrochlore phases can be obtained in the systems Bi/sub 2-x/M/sub x/Ru/sub 2-y/Ir/sub y/O/sub 7-z/ by partial substitution of M (M=Mg, Ca, Sr, Co, Cu) for Bi/sup 3+/. The high electric conductivity and the insolubility in mineral acids and bases are preserved for all pyrochlore phases.
https://doi.org/10.1016/0025-5408(86)90187-X
Similarities and differences in the structural and electronic properties of ruthenium and iridium pyrochlores A{sub 2}M{sub 2}O{sub 7{minus}y} (M = Ru, Ir)

Journal Article Koo, H J ; Whangbo, M H ; Kennedy, B J - Journal of Solid State Chemistry

Electronic band structures of the ruthenium and iridium pyrochlores A{sub 2}M{sub 2}O{sub 6}O{sub 1{minus}y}{prime} (M = Ru, Ir) were examined using the extended Hueckel tight-binding method. The metal versus semiconductor behaviors of these pyrochlores are explained in terms of the Mott-Hubbard localization concept. The M-O, A-O, and A-O{prime} distances and M-O-M angles of A{sub 2}M{sub 2}O{sub 6}O{sub 1{minus}y}{prime} (M = Ru, Ir) were analyzed in terms of the A cation ionic radius. The M-O distance and the M-O-M angle are strongly influenced by the overlap repulsion between the filled shells of the A cation and O{sup 2{minus}} anions. The O{prime}more »« less
https://doi.org/10.1006/jssc.1997.7705
Crystal structure and electrical properties of the pyrochlore ruthenate Bi[sub 2-x]Y[sub x]Ru[sub 2]O[sub 7]

Journal Article Kanno, R ; Takeda, Y ; Yamamoto, T ; ... - Journal of Solid State Chemistry; (United States)

The bismuth yttrium pyrochlore ruthenates Bi[sub 2-x]Y[sub x]Ru[sub 2]O[sub 7] have been synthesized and characterized by x-ray Rietveld structure refinement and electrical conductivity measurement. Room temperature resistivities increase with x, and a change from metallic to semiconducting behavior is observed between x = 1.2 and 1.4. The distortion of the RuO[sub 6] octahedra and the bend in the RuO[sub 6] zig-zag chains increase with x. The transition from metallic to semiconducting state is correlated with the variation of the Ru-O-Ru angle from 139[degree] at x = 0.0 to 129[degree] at x = 2.0. The Ru-O bond length in the RuO[submore »« less
https://doi.org/10.1006/jssc.1993.1012
Synthesis, structure, and ferromagnetism of the oxygen defect pyrochlore system Lu{sub 2}V{sub 2}O{sub 7-x} (x=0.40-0.65)

Journal Article Knoke, G T ; Niazi, A ; Hill, J M ; ... - Physical Review. B, Condensed Matter and Materials Physics

A fcc oxygen defect pyrochlore structure system Lu{sub 2}V{sub 2}O{sub 7-x} with x=0.40-0.65 was synthesized from the known fcc ferromagnetic semiconductor pyrochlore compound Lu{sub 2}V{sub 2}O{sub 7} which can be written as Lu{sub 2}V{sub 2}O{sub 6}O{sup '} with two inequivalent oxygen sites O and O{sup '}. Rietveld x-ray diffraction refinements show significant Lu-V antisite disorder for x > or approx. 0.5. The lattice parameter versus x (including x=0) shows a distinct maximum at x{approx}0.4. We propose that these observations can be explained if the oxygen defects are on the O{sup '} sublattice of the structure. The magnetic susceptibility versus temperaturemore »« less
https://doi.org/10.1103/PHYSREVB.76.054439
Crystal structure and metal-semiconductor transition of the Bi[sub 2[minus]x]Ln[sub x]Ru[sub 2]O[sub 7] pyrochlores (Ln = Pr-Lu)

Journal Article Yamamoto, T ; Kanno, R ; Kawamoto, Y ; ... - Journal of Solid State Chemistry; (United States)

The quaternary pyrochlore ruthenates, Bi[sub 2[minus]z]Ln[sub x]Ru[sub 2]O[sub 7] (Ln = Pr-Lu), have been synthesized and characterized by X-ray Rietveld structure refinement and electrical conductivity measurements. Room temperature resistivities increase with x, and a change from metallic to semiconducting behavior is observed between x = 1.2 and 1.4. In this composition region, smooth change from metallic to semiconducting behavior was observed at 40-80 K for the Pr-Sm systems, whereas no change was observed for the Dy and Y systems. Lattice parameters increase with x in the systems with larger rare earth cations (Pr, Nd), and decrease with x in themore »« less
https://doi.org/10.1006/jssc.1994.1116

Similar Records