2000年7月
Nuclear-spin relaxation of Co-59 correlated with the spin-state transitions in LaCoO3
PHYSICAL REVIEW B
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- 巻
- 62
- 号
- 1
- 開始ページ
- 410
- 終了ページ
- 414
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.62.410
- 出版者・発行元
- AMER PHYSICAL SOC
The Co-59-NMR on single crystals of LaCoO3 has been studied in order to investigate the spin-stale transition through the nuclear-spin relaxation in this compound. Below T similar to 35 K, the spin-lattice and spin-spin relaxation rates show a thermal-activation-type temperature dependence with an energy gap of similar to 180 K. This value is close to the energy difference between the low spin state (S=0) and the intermediate spin state (S=1) predicted in the two-stage spin-state transition model with the intermediate spin state. The apparent spin-spin relaxation rates depend on the resonance peaks split due to the nuclear-electric-quadrupole interaction, which is explained by an indirect nuclear spin-spin interaction through the interacting paramagnetic electron spins. This observation is consistent with the ferromagnetic short-range correlation among the electron spins on Co3+ ions confirmed by neutron-scattering experiments.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.62.410
- ISSN : 1098-0121
- eISSN : 1550-235X
- Web of Science ID : WOS:000088037000072