Abstract
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.
| Original language | English |
|---|---|
| Article number | 094404 |
| Pages (from-to) | 944041-944045 |
| Number of pages | 5 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 66 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2002 Sep 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Noguchi, S., Kawamata, S., Okuda, K., Nojiri, H., & Motokawa, M. (2002). Evidence for the excited triplet of Co3+ in LaCoO3. Physical Review B - Condensed Matter and Materials Physics, 66(9), 944041-944045. [094404]. https://doi.org/10.1103/PhysRevB.66.094404