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

H. Yoshida, Yuji 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

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Metallic compounds
Magnetic susceptibility
Silver
Electronic properties
Magnetic properties
Impurities
Magnetic fields
impurities
augmentation
Temperature
silver
retarding
magnetic properties
magnetic permeability
orbitals
electrical resistivity
electronics
magnetic fields
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Impurity effects on the Ni3+ triangular lattice of Ag 2NiO2. / Yoshida, H.; Muraoka, Yuji; Hiroi, Z.

In: Journal of Physics Condensed Matter, Vol. 19, No. 14, 145235, 11.04.2007.

Research output: Contribution to journalArticle

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