Spin-State Transition in LaCoO3 : Direct Neutron Spectroscopic Evidence of Excited Magnetic States
Physical Review Letters 97 巻 24 号
247208-1-247208-4 頁
2006-12-15 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Spin-State Transition in LaCoO3 : Direct Neutron Spectroscopic Evidence of Excited Magnetic States
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| 作成者 |
Podlesnyak A.
Streule S.
Mesot J.
Medarde M.
Pomjakushina E.
Conder K.
Haverkort Maurits W.
Khomskii D.I.
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| 収録物名 |
Physical Review Letters
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| 巻 | 97 |
| 号 | 24 |
| 開始ページ | 247208-1 |
| 終了ページ | 247208-4 |
| 抄録 |
A gradual spin-state transition occurs in LaCoO3 around T∼80-120K, whose detailed nature remains controversial. We studied this transition by means of inelastic neutron scattering and found that with increasing temperature an excitation at ∼0.6meV appears, whose intensity increases with temperature, following the bulk magnetization. Within a model including crystal-field interaction and spin-orbit coupling, we interpret this excitation as originating from a transition between thermally excited states located about 120K above the ground state. We further discuss the nature of the magnetic excited state in terms of intermediate-spin (t2g5eg1, S=1) versus high-spin (t2g4eg2, S=2) states. Since the g factor obtained from the field dependence of the inelastic neutron scattering is g∼3, the second interpretation is definitely favored.
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2006-12-15 |
| 権利情報 |
Copyright (c) 2006 The American Physical Society.
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.97.247208
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.97.247208
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