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

Y. Koike; T. Kawaguchi; N. Watanabe; T. 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

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

ENG - Applied Physics

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

42 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 Jul

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "Superconductivity and low-temperature structural phase transition in La1.98-xCe0.02BaxCuO4",

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.",

author = "Y. Koike and T. Kawaguchi and N. Watanabe and T. Noji and Y. Saito",

note = "Funding Information: Acknowledgements -This work was suppurtedb y a Grant-in-Aid for Scientific Research¢ ~n Priority Areas {"}Mechanismo f Superconductivity{"} from the Ministry of Education, Science and Culture, Japan.",

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doi = "10.1016/0038-1098(91)90081-6",

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T1 - Superconductivity and low-temperature structural phase transition in La1.98-xCe0.02BaxCuO4

AU - Koike, Y.

AU - Kawaguchi, T.

AU - Watanabe, N.

AU - Noji, T.

AU - Saito, Y.

N1 - Funding Information: Acknowledgements -This work was suppurtedb y a Grant-in-Aid for Scientific Research¢ ~n Priority Areas "Mechanismo f Superconductivity" from the Ministry of Education, Science and Culture, Japan.

PY - 1991/7

Y1 - 1991/7

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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JF - Solid State Communications

SN - 0038-1098

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

Abstract

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