Magnetic-Electronic, Conductivity, and Structural Pressure Studies of Sr_2FeO_4 and Sr_3Fe_2O_7

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Sr<SUB>2</SUB>FeO<SUB>4</SUB> and Sr<SUB>3</SUB>Fe<SUB>2</SUB>O<SUB>7</SUB> have been investigated by resistance-temperature, <SUP>57</SUP>Fe-Mössbauer magnetic and x-ray diffraction studies up to ∼30 GPa. Magnetic moments in Sr<SUB>2</SUB>FeO<SUB>4</SUB> remain intact across the conductivity transition to a metallic state at ∼17 GPa. The complex spiral-type magnetic structure at low pressure changes to collinear in the metallic state. In Sr<SUB>3</SUB>Fe<SUB>2</SUB>O<SUB>7</SUB> the original disproportionated state and associated magnetic-electronic structure first exhibits a change at ∼12-15 GPa, and only a single valence state is discernible at P ≥ 21 GPa. A very narrow gapped state prevalent at ∼10 GPa undergoes a sluggish transition to incipient metallic behavior at ∼28 GPa. X-ray data suggest that the magnetic-electronic and conductivity transitions in both compounds are not driven by symmetry-lowering structural transitions.

収録刊行物

  • 高圧力の科学と技術 = The Review of high pressure science and technology

    高圧力の科学と技術 = The Review of high pressure science and technology 7, 653-655, 1998

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002691318
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4494012
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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