Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
Physical Review Letters 97 巻 17 号
176405-1-176405-4 頁
2006-10-26 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism
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| 作成者 |
Haverkort Maurits W.
Hu Zhiwei
Cezar Júlio C.
Burnus Tobias
Hartmann Helena
Reuther Marco
Zobel C.
Lorenz Thomas
Brookes Nicholas B.
Hsieh Hui-Huang
Lin Hong-Ji
Chen Chien-Te
Tjeng L. Hao
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| 収録物名 |
Physical Review Letters
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| 巻 | 97 |
| 号 | 17 |
| 開始ページ | 176405-1 |
| 終了ページ | 176405-4 |
| 抄録 |
Using soft x-ray absorption spectroscopy and magnetic circular dichroism at the Co-L2,3 edge, we reveal that the spin state transition in LaCoO3 can be well described by a low-spin ground state and a triply degenerate high-spin first excited state. From the temperature dependence of the spectral line shapes, we find that LaCoO3 at finite temperatures is an inhomogeneous mixed-spin state system. It is crucial that the magnetic circular dichroism signal in the paramagnetic state carries a large orbital momentum. This directly shows that the currently accepted low- or intermediate-spin picture is at variance. Parameters derived from these spectroscopies fully explain existing magnetic susceptibility, electron spin resonance, and inelastic neutron data.
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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 | 2006-10-26 |
| 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.97.176405
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.97.176405
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