ダイヤモンドアンビルセルによる高圧構造探索研究: 遷移金属二フッ化物の高圧下X線回折と発光測定

• 遊佐 斉

  国立研究開発法人物質・ 材料研究機構　機能性材料研究拠点　超高圧グループ

書誌事項

タイトル別名

• High-pressure Structural Research Using DAC： XRD and XES Measurements of Transition Metal Difluorides under High Pressure
• ダイヤモンドアンビルセル ニ ヨル コウアツ コウゾウ タンサク ケンキュウ : センイ キンゾク ニ フッカブツ ノ コウアツカ Xセン カイセツ ト ハッコウ ソクテイ

抄録

Regarding to pressure response to the high-pressure phase, generally the fluoride is more sensitive than oxides. Therefore, fluorides are frequently used as analog materials for investigating novel high-pressure phases in oxides. The high-pressure phase sequence in metal MnF₂, and CoF₂ was investigated with x-ray diffraction (XRD) and x-ray emission spectrum (XES) measurements under high pressure by using a laser-heated diamond anvil cell at synchrotron radiation facilities. The transition from rutile to orthorhombic I phase, and further transformation to cotunnite phase were confirmed in MnF₂ at 3.9 GPa and 9.9 GPa, respectively. An anomaly exhibiting a negative linear compressibility in the b axis was detected by XRD measurements of the cotunnite phase above 80 GPa. The anomaly may be related to the intensity change of MnKβ’ in XES suggesting high-spin low-spin in Mn²⁺. The PdF₂-to-CaF₂ phase transition occurred at 12 GPa in CoF₂. The XES reflects the coordination change from PdF₂ to CoF₂ structure.

収録刊行物

• 材料

  材料 67 (5), 527-532, 2018-05-15

  公益社団法人 日本材料学会

キーワード

• Laser-heated DAC
• High pressure
• XRD
• XES
• Phase transition
• Spin Crossover
• MnF₂
• CoF₂

詳細情報

• CRID: 1390282680422915328
• NII論文ID: 130006742986
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.67.527
• ISSN: 18807488
• ISSN: 05145163
• NDL書誌ID: 029073905
• Web Site: http://id.ndl.go.jp/bib/029073905
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029073905
• Web Site: https://www.jstage.jst.go.jp/article/jsms/67/5/67_527/_pdf
• 本文言語コード: ja
• データソース種別:
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  • NDL
  • Crossref
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• 抄録ライセンスフラグ: 使用不可