Observation of local crystal structure change in (CaxLa1-x)(Ba1.75-xLa0.25+x) Cu3O7+δ tetragonal superconductor using Raman scattering

Yasushi Sato; Kohtaro Yoshioka; Valery Petrykin; Masato Kakihana; Yoshito Tanaka; Ai Yamaguchi; Takahiro Katsumata; Hiroshi Yasuoka

doi:10.2497/jjspm.49.372

Observation of local crystal structure change in (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x) Cu₃O_7+δ tetragonal superconductor using Raman scattering

Yasushi Sato, Kohtaro Yoshioka, Valery Petrykin, Masato Kakihana, Yoshito Tanaka, Ai Yamaguchi, Takahiro Katsumata, Hiroshi Yasuoka

Center for Exploration of New Inorganic Materials

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

2 Citations (Scopus)

Abstract

Polycrystalline samples of (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x)Cu₃O_7+δ (CLBCO) tetragonal superconductor for x from 0.0 to 0.6 were studied by Raman scattering technique, which is sensitive to oxygen site symmetry in the high-T_c superconductors. On the Raman spectra, five extra modes at 200, 320, 400, 565 and 610 cm^-1, which did not appear on Raman spectra of tetragonal YBa₂Cu₃O₆, were observed. Based on the model that apical oxygen O(4) is displaced by La³⁺ on Ba site and the result of group theoretical analysis for this model, the 565 cm^-1 mode which possessed the strongest intensity among these extra modes could be assigned to another O(4) vibration. This indicates that O(4) is strongly attracted by La³⁺ on Ba site, resulting in a change of local structure.

Original language	English
Pages (from-to)	372-376
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	49
Issue number	5
DOIs	https://doi.org/10.2497/jjspm.49.372
Publication status	Published - 2002 May

Keywords

Amorphous citric acid method
Cation disordering
Cuprate superconductor
Local crystal structure
Raman scattering

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Sato, Y., Yoshioka, K., Petrykin, V., Kakihana, M., Tanaka, Y., Yamaguchi, A., Katsumata, T., & Yasuoka, H. (2002). Observation of local crystal structure change in (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x) Cu₃O_7+δ tetragonal superconductor using Raman scattering. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 49(5), 372-376. https://doi.org/10.2497/jjspm.49.372

Observation of local crystal structure change in (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x) Cu₃O_7+δ tetragonal superconductor using Raman scattering. / Sato, Yasushi; Yoshioka, Kohtaro; Petrykin, Valery; Kakihana, Masato; Tanaka, Yoshito; Yamaguchi, Ai; Katsumata, Takahiro; Yasuoka, Hiroshi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 49, No. 5, 05.2002, p. 372-376.

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

Sato, Y, Yoshioka, K, Petrykin, V, Kakihana, M, Tanaka, Y, Yamaguchi, A, Katsumata, T & Yasuoka, H 2002, 'Observation of local crystal structure change in (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x) Cu₃O_7+δ tetragonal superconductor using Raman scattering', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 49, no. 5, pp. 372-376. https://doi.org/10.2497/jjspm.49.372

Sato, Yasushi ; Yoshioka, Kohtaro ; Petrykin, Valery ; Kakihana, Masato ; Tanaka, Yoshito ; Yamaguchi, Ai ; Katsumata, Takahiro ; Yasuoka, Hiroshi. / Observation of local crystal structure change in (Ca_xLa_1-x)(Ba_1.75-xLa_0.25+x) Cu₃O_7+δ tetragonal superconductor using Raman scattering. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 2002 ; Vol. 49, No. 5. pp. 372-376.

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title = "Observation of local crystal structure change in (CaxLa1-x)(Ba1.75-xLa0.25+x) Cu3O7+δ tetragonal superconductor using Raman scattering",

abstract = "Polycrystalline samples of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3 O7+δ (CLBCO) tetragonal superconductor for x from 0.0 to 0.6 were studied by Raman scattering technique, which is sensitive to oxygen site symmetry in the high-Tc superconductors. On the Raman spectra, five extra modes at 200, 320, 400, 565 and 610 cm-1, which did not appear on Raman spectra of tetragonal YBa2Cu3O6, were observed. Based on the model that apical oxygen O(4) is displaced by La3+ on Ba site and the result of group theoretical analysis for this model, the 565 cm-1 mode which possessed the strongest intensity among these extra modes could be assigned to another O(4) vibration. This indicates that O(4) is strongly attracted by La3+ on Ba site, resulting in a change of local structure.",

keywords = "Amorphous citric acid method, Cation disordering, Cuprate superconductor, Local crystal structure, Raman scattering",

author = "Yasushi Sato and Kohtaro Yoshioka and Valery Petrykin and Masato Kakihana and Yoshito Tanaka and Ai Yamaguchi and Takahiro Katsumata and Hiroshi Yasuoka",

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AU - Sato, Yasushi

AU - Yoshioka, Kohtaro

AU - Petrykin, Valery

AU - Kakihana, Masato

AU - Tanaka, Yoshito

AU - Yamaguchi, Ai

AU - Katsumata, Takahiro

AU - Yasuoka, Hiroshi

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N2 - Polycrystalline samples of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3 O7+δ (CLBCO) tetragonal superconductor for x from 0.0 to 0.6 were studied by Raman scattering technique, which is sensitive to oxygen site symmetry in the high-Tc superconductors. On the Raman spectra, five extra modes at 200, 320, 400, 565 and 610 cm-1, which did not appear on Raman spectra of tetragonal YBa2Cu3O6, were observed. Based on the model that apical oxygen O(4) is displaced by La3+ on Ba site and the result of group theoretical analysis for this model, the 565 cm-1 mode which possessed the strongest intensity among these extra modes could be assigned to another O(4) vibration. This indicates that O(4) is strongly attracted by La3+ on Ba site, resulting in a change of local structure.

AB - Polycrystalline samples of (CaxLa1-x)(Ba1.75-xLa0.25+x)Cu3 O7+δ (CLBCO) tetragonal superconductor for x from 0.0 to 0.6 were studied by Raman scattering technique, which is sensitive to oxygen site symmetry in the high-Tc superconductors. On the Raman spectra, five extra modes at 200, 320, 400, 565 and 610 cm-1, which did not appear on Raman spectra of tetragonal YBa2Cu3O6, were observed. Based on the model that apical oxygen O(4) is displaced by La3+ on Ba site and the result of group theoretical analysis for this model, the 565 cm-1 mode which possessed the strongest intensity among these extra modes could be assigned to another O(4) vibration. This indicates that O(4) is strongly attracted by La3+ on Ba site, resulting in a change of local structure.

KW - Amorphous citric acid method

KW - Cation disordering

KW - Cuprate superconductor

KW - Local crystal structure

KW - Raman scattering

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