Polymerized complex synthesis and the Raman scattering of Bi2.1Sr1.9-xLaxCuO6+d

Atsuyoshi Inoue, Masato Kakihara, Minoru Osada, Shinjirou Tochihara, Hiroshi Yasuoka, Hiromasa Mazaki, Masatomo Yashima

Research output: Contribution to journalArticle

Abstract

High-purity polycrystalline samples of Bi2.1Sr1.9-xLaxCuO6+d 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 Bi17Sr16Cu7Oy, CuO, Bi2Sr3Cu2Oy. The dependence of the superconducting transition temperature Tc(onset) with increasing La content has a parabolic-like behavior with maximum Tc(onset)=16.6 K at x=0.3. We heve investigated the effect of La substitution for Sr on Raman spectra of Bi2.1Sr1.9-xLaxCuO6+d. The apical-oxygen phonon at ∼ 630cm-1 softens by ∼ 20 cm-1 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.

Original languageEnglish
Pages (from-to)137-141
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume44
Issue number2
Publication statusPublished - 1997 Feb
Externally publishedYes

Keywords

  • BiSrLaCuO superconductor
  • Complex magnetic susceptibility
  • Polymerized complex method
  • Raman scattering

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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    Inoue, A., Kakihara, M., Osada, M., Tochihara, S., Yasuoka, H., Mazaki, H., & Yashima, M. (1997). Polymerized complex synthesis and the Raman scattering of Bi2.1Sr1.9-xLaxCuO6+d Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 44(2), 137-141.