Raman scattering of Pb-based high-Tc superconducting oxides

Masato Kakihana, Minoru Osada, Ichiro Nagai, Takashi Noji, Masatsune Kato, Yoji Koike

Research output: Contribution to journalArticle

Abstract

Raman spectra of (Pb2Cu)Sr2Y1-xCaxCu2O8+δ (Pb3212), (Pb2Cu)Sr0.9La1.1CuO6+δ (Pb3201), and (Pb0.5Cu0.5)Sr2YCu2O7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-Tc superconducting oxides were proposed. In particular, the assignment of the 480- and 580-cm-1. Raman bands to oxygen in the PbO and SrO layers, respectively, was unambiguously established. In the case of Pb3212 we found that the intensities of modes connected to the CuO2-plane variations decreased with increasing carrier concentration. This effect was attributed to the increased metallic screening in the CuO2 planes that can be expected in the hole-rich Ca-doped samples.

Original languageEnglish
Pages (from-to)999-1003
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume46
Issue number9
Publication statusPublished - 1999 Sep
Externally publishedYes

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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