Impurity effects on the Ni3+ triangular lattice of Ag 2NiO2

H. Yoshida, Y. Muraoka, Z. Hiroi

Research output: Contribution to journalArticle

Abstract

Silver oxonickelate Ag2NiO2 is a metallic compound presenting a spin-1/2 triangular lattice. It exhibits a structural transition at Ts ≤ 260K, which may be related to eg orbital ordering, and an antiferromagnetic transition at TN ≤ 55K. Impurity effects on its magnetic and electronic properties are examined by substituting Fe for Ni in Ag2Ni1-xFexO 2 (0≤x≤0.3). A Curie-like enhancement in magnetic susceptibility is observed at low temperature, which implies that most Fe 3+ spins behave as free spins. Moreover, a large enhancement of residual resistivity and its suppression under magnetic fields are observed. Magnetic interactions in the Ni3+ triangular lattice are discussed.

Original languageEnglish
Article number145235
JournalJournal of Physics Condensed Matter
Volume19
Issue number14
DOIs
Publication statusPublished - Apr 11 2007
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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