Evidence for the excited triplet of Co3+ in LaCoO3

S. Noguchi, S. Kawamata, K. Okuda, H. Nojiri, M. Motokawa

研究成果: Article査読

174 被引用数 (Scopus)

抄録

The state excited from the ground singlet of Co3+ in LaCoO3 was investigated by submillimeter-wave electron spin resonance (ESR) measurements. Clear ESR signals with zero-field splitting were observed above 20 K for the first time. The activation energy is estimated to be △≈140 K, from the temperature dependence of the signal intensity and the resonance-width. The frequency and angular dependence of the signals were successfully analyzed by an effective spin-Hamiltonian with uniaxial anisotropy. The parameters obtained are g∥=3.35, g⊥=3.55, and D=+4.90 cm-1 for the effective spin S= 1. The results reveal that the first excited state is a triplet with a zero-field splitting of Co3+ in LaCoO3.

本文言語English
論文番号094404
ページ(範囲)944041-944045
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
66
9
DOI
出版ステータスPublished - 2002 9月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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