書誌事項
- タイトル別名
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- X-ray Magnetic Circular Dichroism of La1-xSrxCoO3 and the First-Principles Calculations
- La1 x Sr x CoO3 ノ Xセン ジキエン 2ショクセイ ト ダイイチ ゲンリ ケイサン
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The electronic and magnetic structure of La1-xSrxCoO3 (0.0≤x≤0.6) has been studied by X-ray magnetic circular dichroism (XMCD) at the Co K absorption edge. A negative XMCD peak was clearly observed for pure LaCoO3 at E=7.719 keV within the threshold region, suggesting the existence of the intermediate-spin state of Co3+. A positive XMCD peak at E=7.723 keV was assigned to Co4+, having the double-exchange interaction between Co3+ and Co4+. In order to verify the origin of XMCD, the electronic structure of ground and is core-hole states was calculated by a DV-Xα Hartree-Fock-Slater method, using several cluster models up to the fifth neighbor shell. The first-principles calculations well reproduced the experimental XMCD spectra, where a hybridization of Co 3d, 4p and O 2p orbits stabilizes a magnetic state of La1-xSrxCoO3.
収録刊行物
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- 日本結晶学会誌
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日本結晶学会誌 50 (4), 269-275, 2008
日本結晶学会
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詳細情報 詳細情報について
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- CRID
- 1390001204086536704
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- NII論文ID
- 10024283149
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- NII書誌ID
- AN00188364
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- ISSN
- 18845576
- 03694585
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- NDL書誌ID
- 9643471
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可