| フルテキストURL | 2008010263.pdf ( 287.4KB ) 公開日 2010-04-16
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| タイトル | Disordered and displacive models for the structure of the normal phase of ｛N(CH_3)_4｝_2MnCl_4 |
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| 作成者 | Koshiji, Naohiro
Mashiyama, Hiroyuki
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| 作成者ヨミ | コシジ, ナオヒロ
マシヤマ, ヒロユキ
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| 作成者別表記 | 増山, 博行
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| 作成者所属 | 山口大学大学院理工学研究科（理学）
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| 内容記述（抄録等） | The crystal structure of the normal phase in ｛N(CH_3)_4｝_2MnCl_4 has been analyzed for two models: a displacive model and a disordered model. In the former model, the constituent tetrahedra of tetramethylammonium and tetrachloromanganate satisfy a mirror symmetry themselves imposed by the crystal symmetry. In the latter model, each tetrahedron occupies two equivalent positions related by the mirror symmetry with an equal occupation probability: split atom method. A special attention has been paid to their thermal parameters; the former model exhibits an abnormal increase of the parameters near the transition temperature indicating a critical phenomenon. From the significant test for the R factor, the latter model seems to be more adequate than the former one. The disorderness of tetrahedra of tetramethylammonium is also confirmed by double peaks in Fourier synthesis map. On the other hand, MnCl_4 can be well represented both by the displacive and the disordered models.
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| 本文言語 | eng
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| 著者キーワード | normal phase
structure analysis
displacive model
disordered model
split atom method
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| 資料タイプ | text |
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| ファイル形式 | application/pdf |
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| 出版者 | The Physical Society of Japan
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| 出版者ヨミ | ニホン ブツリ ガッカイ
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| NII資料タイプ | 学術雑誌論文 |
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| 査読の有無 | 査読あり |
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| ISSN | 0031-9015
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| NCID | AA00704814
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| 掲載誌名 | Journal of the Physical Society of Japan |
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| 巻 | 69 |
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| 号 | 12 |
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| 開始ページ | 3853 |
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| 終了ページ | 3859 |
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| 発行日 | 2000 |
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| DOI | info:doi/10.1143/JPSJ.69.3853 |
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| 関連情報URL(IsPartOf) | http://www.ipap.jp/jpsj/index.html
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| 権利関係 | Copyright c (2002)The Physical Society of Japan
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| 著者版/出版社版 | 著者版 |
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| リポジトリID | 2008010263 |
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| 地域区分 | 山口大学
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| URI | http://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2008010263 |
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