On the correlations between Sr: Ca substitution and structural modulation in the Bi-2212 phase

Y. Oikawa; P. P. Saligan; K. Koizumi; H. Enomoto; Y. Takano; K. Sekizawa; Etsuo Uchida; H. Ozaki

doi:10.1007/BF02562826

On the correlations between Sr: Ca substitution and structural modulation in the Bi-2212 phase

Y. Oikawa, P. P. Saligan, K. Koizumi, H. Enomoto, Y. Takano, K. Sekizawa, Etsuo Uchida, H. Ozaki

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Abstract

XPS and chemical titration both were carried out on Bi_2+xSr_l.8CaCu₂O_z and Bi₂Sr_l.8-yCa_l+yCu₂0_zprepared by solid state reaction in order to investigate the correlation between the structural modulation and the mutual substitution of atoms. There was no clear evidence about the correlation between the modulation period by XRD and the site occupancies of Sr and Ca by XPS. However, there was a tendency that Bi mean valence by titration inereased with increasing excess oxygen content and modulation period. The former one indicates the charge compensation and the latter one suggests the possibility of the origin of the structural modulation except for the excess oxygen.

Original language	English
Pages (from-to)	1423-1424
Number of pages	2
Journal	Czechoslovak Journal of Physics
Volume	46
Issue number	SUPPL. 3
DOIs	https://doi.org/10.1007/BF02562826
Publication status	Published - 1996

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ASJC Scopus subject areas

Physics and Astronomy(all)

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Oikawa, Y., Saligan, P. P., Koizumi, K., Enomoto, H., Takano, Y., Sekizawa, K., Uchida, E., & Ozaki, H. (1996). On the correlations between Sr: Ca substitution and structural modulation in the Bi-2212 phase. Czechoslovak Journal of Physics, 46(SUPPL. 3), 1423-1424. https://doi.org/10.1007/BF02562826

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abstract = "XPS and chemical titration both were carried out on Bi2+xSrl.8CaCu2Oz and Bi2Srl.8-yCal+yCu20zprepared by solid state reaction in order to investigate the correlation between the structural modulation and the mutual substitution of atoms. There was no clear evidence about the correlation between the modulation period by XRD and the site occupancies of Sr and Ca by XPS. However, there was a tendency that Bi mean valence by titration inereased with increasing excess oxygen content and modulation period. The former one indicates the charge compensation and the latter one suggests the possibility of the origin of the structural modulation except for the excess oxygen.",

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T2 - Ca substitution and structural modulation in the Bi-2212 phase

AU - Oikawa, Y.

AU - Saligan, P. P.

AU - Koizumi, K.

AU - Enomoto, H.

AU - Takano, Y.

AU - Sekizawa, K.

AU - Uchida, Etsuo

AU - Ozaki, H.

PY - 1996

Y1 - 1996

N2 - XPS and chemical titration both were carried out on Bi2+xSrl.8CaCu2Oz and Bi2Srl.8-yCal+yCu20zprepared by solid state reaction in order to investigate the correlation between the structural modulation and the mutual substitution of atoms. There was no clear evidence about the correlation between the modulation period by XRD and the site occupancies of Sr and Ca by XPS. However, there was a tendency that Bi mean valence by titration inereased with increasing excess oxygen content and modulation period. The former one indicates the charge compensation and the latter one suggests the possibility of the origin of the structural modulation except for the excess oxygen.

AB - XPS and chemical titration both were carried out on Bi2+xSrl.8CaCu2Oz and Bi2Srl.8-yCal+yCu20zprepared by solid state reaction in order to investigate the correlation between the structural modulation and the mutual substitution of atoms. There was no clear evidence about the correlation between the modulation period by XRD and the site occupancies of Sr and Ca by XPS. However, there was a tendency that Bi mean valence by titration inereased with increasing excess oxygen content and modulation period. The former one indicates the charge compensation and the latter one suggests the possibility of the origin of the structural modulation except for the excess oxygen.

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10.1007/BF02562826