Raman scattering of Pb-based high-Tc superconducting oxides

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

doi:10.2497/jjspm.46.999

Raman scattering of Pb-based high-Tc superconducting oxides

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

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Raman spectra of (Pb₂Cu)Sr₂Y_1-xCa_xCu₂O_8+δ (Pb3212), (Pb₂Cu)Sr_0.9La_1.1CuO_6+δ (Pb3201), and (Pb_0.5Cu_0.5)Sr₂YCu₂O_7+δ (Pb1212) were studied and vibrational assignments in harmony with the layer stacking sequences found in these Pb-based high-T_c 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 language	English
Pages (from-to)	999-1003
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	46
Issue number	9
DOIs	https://doi.org/10.2497/jjspm.46.999
Publication status	Published - 1999 Sep

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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title = "Raman scattering of Pb-based high-Tc superconducting oxides",

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.",

author = "Masato Kakihana and Minoru Osada and Ichiro Nagai and Takashi Noji and Masatsune Kato and Yoji Koike",

year = "1999",

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doi = "10.2497/jjspm.46.999",

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T1 - Raman scattering of Pb-based high-Tc superconducting oxides

AU - Kakihana, Masato

AU - Osada, Minoru

AU - Nagai, Ichiro

AU - Noji, Takashi

AU - Kato, Masatsune

AU - Koike, Yoji

PY - 1999/9

Y1 - 1999/9

N2 - 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.

AB - 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.

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SN - 0532-8799

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ER -

Raman scattering of Pb-based high-Tc superconducting oxides

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