Superconductivity in Hole-Doped La1.8-xEu0.2CaxCuO4 with the Nd2CuO4-Type Structure

Tomohisa Takamatsu; Masatsune Kato; Takashi Noji; Yoji Koike

doi:10.1016/j.phpro.2014.09.012

Superconductivity in Hole-Doped La_1.8-xEu_0.2Ca_xCuO₄ with the Nd₂CuO₄-Type Structure

Tomohisa Takamatsu, Masatsune Kato, Takashi Noji, Yoji Koike

ENG - Applied Physics

Research output: Contribution to journal › Conference article › peer-review

12 Citations (Scopus)

Abstract

We have succeeded in synthesizing hole-doped bulk superconductors of La_1.8-xEu_0.2Ca_xCuO₄ (x = 0.05 and 0.10) with the Nd₂CuO₄-type structure by means of the structural transformation at low temperatures from the K2NiF4-type structure via the Nd₄Cu₂O₇-type structure. Superconductivity has appeared through the removal of excess oxygen by the reduction annealing in vacuum. Values of the superconducting transition temperature, T_c, are 13 and 6 K for x = 0.05 and 0.10, respectively. These values are smaller than those of T'-La_1.8-xEu_0.2Sr_xCuO₄.

Original language	English
Pages (from-to)	46-49
Number of pages	4
Journal	Physics Procedia
Volume	58
DOIs	https://doi.org/10.1016/j.phpro.2014.09.012
Publication status	Published - 2014
Event	26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan Duration: 2013 Nov 18 → 2013 Nov 20

Keywords

High-T superconductivity
Hole-doping
Reduction annealing
Solid-state reaction
The NdCuO-type structure

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1016/j.phpro.2014.09.012

Cite this

@article{42984b8e997f405db6314cfc0afdf0fa,

title = "Superconductivity in Hole-Doped La1.8-xEu0.2CaxCuO4 with the Nd2CuO4-Type Structure",

abstract = "We have succeeded in synthesizing hole-doped bulk superconductors of La1.8-xEu0.2CaxCuO4 (x = 0.05 and 0.10) with the Nd2CuO4-type structure by means of the structural transformation at low temperatures from the K2NiF4-type structure via the Nd4Cu2O7-type structure. Superconductivity has appeared through the removal of excess oxygen by the reduction annealing in vacuum. Values of the superconducting transition temperature, Tc, are 13 and 6 K for x = 0.05 and 0.10, respectively. These values are smaller than those of T'-La1.8-xEu0.2SrxCuO4.",

keywords = "High-T superconductivity, Hole-doping, Reduction annealing, Solid-state reaction, The NdCuO-type structure",

author = "Tomohisa Takamatsu and Masatsune Kato and Takashi Noji and Yoji Koike",

note = "Funding Information: This work was partly supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science. Publisher Copyright: {\textcopyright} 2014 The Authors.; 26th International Symposium on Superconductivity, ISS 2013 ; Conference date: 18-11-2013 Through 20-11-2013",

year = "2014",

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language = "English",

volume = "58",

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journal = "Physics Procedia",

issn = "1875-3892",

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TY - JOUR

T1 - Superconductivity in Hole-Doped La1.8-xEu0.2CaxCuO4 with the Nd2CuO4-Type Structure

AU - Takamatsu, Tomohisa

AU - Kato, Masatsune

AU - Noji, Takashi

AU - Koike, Yoji

PY - 2014

Y1 - 2014

N2 - We have succeeded in synthesizing hole-doped bulk superconductors of La1.8-xEu0.2CaxCuO4 (x = 0.05 and 0.10) with the Nd2CuO4-type structure by means of the structural transformation at low temperatures from the K2NiF4-type structure via the Nd4Cu2O7-type structure. Superconductivity has appeared through the removal of excess oxygen by the reduction annealing in vacuum. Values of the superconducting transition temperature, Tc, are 13 and 6 K for x = 0.05 and 0.10, respectively. These values are smaller than those of T'-La1.8-xEu0.2SrxCuO4.

AB - We have succeeded in synthesizing hole-doped bulk superconductors of La1.8-xEu0.2CaxCuO4 (x = 0.05 and 0.10) with the Nd2CuO4-type structure by means of the structural transformation at low temperatures from the K2NiF4-type structure via the Nd4Cu2O7-type structure. Superconductivity has appeared through the removal of excess oxygen by the reduction annealing in vacuum. Values of the superconducting transition temperature, Tc, are 13 and 6 K for x = 0.05 and 0.10, respectively. These values are smaller than those of T'-La1.8-xEu0.2SrxCuO4.

KW - High-T superconductivity

KW - Hole-doping

KW - Reduction annealing

KW - Solid-state reaction

KW - The NdCuO-type structure

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T2 - 26th International Symposium on Superconductivity, ISS 2013

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