Superconductivity and low-temperature structural phase transition in La1.98-xCe0.02BaxCuO4

Yoji Koike; T. Kawaguchi; N. Watanabe; Takashi Noji; Y. Saito

doi:10.1016/0038-1098(91)90081-6

Superconductivity and low-temperature structural phase transition in La_1.98-xCe_0.02Ba_xCuO₄

Yoji Koike, T. Kawaguchi, N. Watanabe, Takashi Noji, Y. Saito

ENG - Applied Physics

Research output: Contribution to journal › Article

41 Citations (Scopus)

Abstract

Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La_2-xBa_xCuO₄. The local minimum of T_c as a function of Ba concentration x, appearing near x = 0.125 for La_2-xBa_xCuO₄, clearly shifts to x = 0.145 for La_1.98-xCe_0.02Ba_xCuO₄. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La_2-xBa_xCuO₄ is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.

Original language	English
Pages (from-to)	155-158
Number of pages	4
Journal	Solid State Communications
Volume	79
Issue number	2
DOIs	https://doi.org/10.1016/0038-1098(91)90081-6
Publication status	Published - 1991 Jan 1

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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Koike, Y., Kawaguchi, T., Watanabe, N., Noji, T., & Saito, Y. (1991). Superconductivity and low-temperature structural phase transition in La_1.98-xCe_0.02Ba_xCuO₄ Solid State Communications, 79(2), 155-158. https://doi.org/10.1016/0038-1098(91)90081-6

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abstract = "Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.",

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AU - Saito, Y.

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N2 - Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.

AB - Effects of the partial substitution of Ce for La on the superconductivity and the low-temperature structural phase transition have been investigated in La2-xBaxCuO4. The local minimum of Tc as a function of Ba concentration x, appearing near x = 0.125 for La2-xBaxCuO4, clearly shifts to x = 0.145 for La1.98-xCe0.02BaxCuO4. The range of x, where a resistance minimum relating to the low-temperature structural phase transition appears, shifts to that of larger x values, too. These suggest that the low-temperature structural phase transition around x = 0.125 in La2-xBaxCuO4 is due to the optimum hole concentration of 0.125 per Cu atom rather than plausible atomic ordering of La and Ba.

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