Robust paramagnetism in (formula presented) (formula presented) Fe, Co, Ni, Cu) pyrochlore

M. K. Haas, R. J. Cava, M. Avdeev, J. D. Jorgensen

Research output: Contribution to journalArticle

Abstract

We report magnetic susceptibility, resistivity, and Seebeck coefficients for (formula presented) pyrochlore. The solid solution exists up to (formula presented) for (formula presented) Ni, Co and up to (formula presented) for (formula presented) 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 (formula presented) 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.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number9
DOIs
StatePublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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