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

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:
; ; ;
Publication Date:
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.
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
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.
@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}
}