Synthesis of the Ba-substituted Bi-2212 phase of BiPb(Sr, Ba)2 RECu2O8

Tomoaki Watanabe; Kohei Nakagawa; Chiaki Sugimoto; Koki Takano; Ryohei Ito; Takayuki Kawamata; Takashi Noji; Masatsune Kato

doi:10.35848/1347-4065/ab8603

Synthesis of the Ba-substituted Bi-2212 phase of BiPb(Sr, Ba)₂ RECu₂O₈

Tomoaki Watanabe, Kohei Nakagawa, Chiaki Sugimoto, Koki Takano, Ryohei Ito, Takayuki Kawamata, Takashi Noji, Masatsune Kato

ENG - Applied Physics

Research output: Contribution to journal › Article

Abstract

We have attempted to synthesize the Bi-2212 phase of BiPbSr_2-xBa_x RECu₂O_8+δ (RE = Nd, Sm, Gd, Y, Yb) by the conventional solid-state reaction method. The completely Ba-substituted sample with x = 1 has been successfully synthesized only for Nd. As the ionic radius of RE decreases, the solubility limit of Ba decreases. It has been found that the substitution of Ba for Sr requires the expansion of both the Bi-O and RE layers as well as the synthesis in a reducing atmosphere to suppress the formation of BaBiO₃-related phases. Unfortunately, the hole-doping to semiconducting BaPbBa₂NdCu₂O_8+δ has not been successful.

Original language	English
Article number	050902
Journal	Japanese journal of applied physics
Volume	59
Issue number	5
DOIs	https://doi.org/10.35848/1347-4065/ab8603
Publication status	Published - 2020 May 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Watanabe, T., Nakagawa, K., Sugimoto, C., Takano, K., Ito, R., Kawamata, T., Noji, T., & Kato, M. (2020). Synthesis of the Ba-substituted Bi-2212 phase of BiPb(Sr, Ba)₂ RECu₂O₈ Japanese journal of applied physics, 59(5), [050902]. https://doi.org/10.35848/1347-4065/ab8603

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title = "Synthesis of the Ba-substituted Bi-2212 phase of BiPb(Sr, Ba)2 RECu2O8 ",

abstract = "We have attempted to synthesize the Bi-2212 phase of BiPbSr2-xBax RECu2O8+δ (RE = Nd, Sm, Gd, Y, Yb) by the conventional solid-state reaction method. The completely Ba-substituted sample with x = 1 has been successfully synthesized only for Nd. As the ionic radius of RE decreases, the solubility limit of Ba decreases. It has been found that the substitution of Ba for Sr requires the expansion of both the Bi-O and RE layers as well as the synthesis in a reducing atmosphere to suppress the formation of BaBiO3-related phases. Unfortunately, the hole-doping to semiconducting BaPbBa2NdCu2O8+δ has not been successful.",

author = "Tomoaki Watanabe and Kohei Nakagawa and Chiaki Sugimoto and Koki Takano and Ryohei Ito and Takayuki Kawamata and Takashi Noji and Masatsune Kato",

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T1 - Synthesis of the Ba-substituted Bi-2212 phase of BiPb(Sr, Ba)2 RECu2O8

AU - Watanabe, Tomoaki

AU - Nakagawa, Kohei

AU - Sugimoto, Chiaki

AU - Takano, Koki

AU - Ito, Ryohei

AU - Kawamata, Takayuki

AU - Noji, Takashi

AU - Kato, Masatsune

PY - 2020/5/1

Y1 - 2020/5/1

N2 - We have attempted to synthesize the Bi-2212 phase of BiPbSr2-xBax RECu2O8+δ (RE = Nd, Sm, Gd, Y, Yb) by the conventional solid-state reaction method. The completely Ba-substituted sample with x = 1 has been successfully synthesized only for Nd. As the ionic radius of RE decreases, the solubility limit of Ba decreases. It has been found that the substitution of Ba for Sr requires the expansion of both the Bi-O and RE layers as well as the synthesis in a reducing atmosphere to suppress the formation of BaBiO3-related phases. Unfortunately, the hole-doping to semiconducting BaPbBa2NdCu2O8+δ has not been successful.

AB - We have attempted to synthesize the Bi-2212 phase of BiPbSr2-xBax RECu2O8+δ (RE = Nd, Sm, Gd, Y, Yb) by the conventional solid-state reaction method. The completely Ba-substituted sample with x = 1 has been successfully synthesized only for Nd. As the ionic radius of RE decreases, the solubility limit of Ba decreases. It has been found that the substitution of Ba for Sr requires the expansion of both the Bi-O and RE layers as well as the synthesis in a reducing atmosphere to suppress the formation of BaBiO3-related phases. Unfortunately, the hole-doping to semiconducting BaPbBa2NdCu2O8+δ has not been successful.

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