Superconductivity and crystal structure of Pb(Ba,Sr)2(Ln,Ca)Cu3Oy and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy(Ln: lanthanoid) with (Pb,Cu) double layers

Ayako Tokiwa; Yasuhiko Syono; Takeo Oku; Masayasu Nagoshi

doi:10.1016/0921-4534(91)92112-O

Superconductivity and crystal structure of Pb(Ba,Sr)₂(Ln,Ca)Cu₃O_y and Pb(Ba,Sr)₂(Ln,Ce)₂Cu₃O_y(Ln: lanthanoid) with (Pb,Cu) double layers

Ayako Tokiwa, Yasuhiko Syono, Takeo Oku, Masayasu Nagoshi

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

3 Citations (Scopus)

Abstract

Pb(Ba,Sr)₂(Ln,Ca)Cu₃O_y (Pb2212, y=7.0-8.4) and Pb(Ba,Sr)₂(Ln,Ce)₂Cu₃O_y (Pb2222, y=9.0-10.4) were synthesized, and crystal structure, phase transition and superconductivity were studied. The lanthanoid contraction was clearly observed in a relationship of 4f-electron number of Ln³⁺ versus cell volume of Pb2212, consistent with constant oxygen content for all of the lanthanoid substitutions. Transition temperature from oxygen rich phase to poor one was almost constant to be 580°C, in contrast to variation of the ortho-tetra transition temperature in Ba₂LnCu₃O_y.

Original language	English
Pages (from-to)	619-620
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	185-189
Issue number	PART 1
DOIs	https://doi.org/10.1016/0921-4534(91)92112-O
Publication status	Published - 1991 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Superconductivity and crystal structure of Pb(Ba,Sr)₂(Ln,Ca)Cu₃O_y and Pb(Ba,Sr)₂(Ln,Ce)₂Cu₃O_y(Ln : lanthanoid) with (Pb,Cu) double layers. / Tokiwa, Ayako; Syono, Yasuhiko; Oku, Takeo; Nagoshi, Masayasu.

In: Physica C: Superconductivity and its applications, Vol. 185-189, No. PART 1, 01.12.1991, p. 619-620.

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

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abstract = "Pb(Ba,Sr)2(Ln,Ca)Cu3Oy (Pb2212, y=7.0-8.4) and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy (Pb2222, y=9.0-10.4) were synthesized, and crystal structure, phase transition and superconductivity were studied. The lanthanoid contraction was clearly observed in a relationship of 4f-electron number of Ln3+ versus cell volume of Pb2212, consistent with constant oxygen content for all of the lanthanoid substitutions. Transition temperature from oxygen rich phase to poor one was almost constant to be 580°C, in contrast to variation of the ortho-tetra transition temperature in Ba2LnCu3Oy.",

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T1 - Superconductivity and crystal structure of Pb(Ba,Sr)2(Ln,Ca)Cu3Oy and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy(Ln

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AU - Tokiwa, Ayako

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AU - Oku, Takeo

AU - Nagoshi, Masayasu

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N2 - Pb(Ba,Sr)2(Ln,Ca)Cu3Oy (Pb2212, y=7.0-8.4) and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy (Pb2222, y=9.0-10.4) were synthesized, and crystal structure, phase transition and superconductivity were studied. The lanthanoid contraction was clearly observed in a relationship of 4f-electron number of Ln3+ versus cell volume of Pb2212, consistent with constant oxygen content for all of the lanthanoid substitutions. Transition temperature from oxygen rich phase to poor one was almost constant to be 580°C, in contrast to variation of the ortho-tetra transition temperature in Ba2LnCu3Oy.

AB - Pb(Ba,Sr)2(Ln,Ca)Cu3Oy (Pb2212, y=7.0-8.4) and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy (Pb2222, y=9.0-10.4) were synthesized, and crystal structure, phase transition and superconductivity were studied. The lanthanoid contraction was clearly observed in a relationship of 4f-electron number of Ln3+ versus cell volume of Pb2212, consistent with constant oxygen content for all of the lanthanoid substitutions. Transition temperature from oxygen rich phase to poor one was almost constant to be 580°C, in contrast to variation of the ortho-tetra transition temperature in Ba2LnCu3Oy.

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