錯体重合法によるBi_<2.1>Sr_<1.9-x>La_xCuO_<6+d>の合成とそのラマン散乱 Polymerized Complex Synthesis and the Raman Scattering of Bi_<2.1>Sr_<1.9-x>La_xCuO_<6+d>

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High-purity polycrystalline samples of Bi<SUB>2.1</SUB>Sr<SUB>1.9-x</SUB>La<SUB>x</SUB>CuO<SUB>6+d</SUB> with x=0-1 have been prepared by the polymerized complex method X-ray powder diffraction and complex magnetic susceptibility mesurements have shown that the samples are of a single-bulk Bi2201 phase without any impurity such as Bi<SUB>17</SUB>Sr<SUB>16</SUB>Cu<SUB>7</SUB>O<SUB>y</SUB>, CuO, Bi<SUB>2</SUB>Sr<SUB>3</SUB>Cu<SUB>2</SUB>O<SUB>y</SUB>, The dependence of the superconducting transition temperature T<SUB>c</SUB>(onset) with increasing La content has a parabolic-like behavior with maximum T<SUB>c</SUB>(onset)=16.6 K at x=0.3. We heve investigated the effect of La substitution for Sr on Raman spectra of Bi<SUB>2.1</SUB>Sr<SUB>1.9-x</SUB>La<SUB>x</SUB>CuO<SUB>6+d</SUB>. The apical-oxygen phonon at-630cm<SUP>-1</SUP> softens by -20cm<SUP>-2</SUP> with increasing La content, when x goes from 0 to 1. This change can be interpreted in terms of the charge redistribution induced by decreasing the Cu and Bi valences with La doping.

収録刊行物

  • 粉体および粉末冶金

    粉体および粉末冶金 44(2), 137-141, 1997-02-15

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002013411
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4139924
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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