Thermal treatment effect of the oxidized La2CuO 4+δ: The access of continuous and discontinuous Tc

L. H. Liu; G. C. Che; J. Zhao; Z. X. Zhao

doi:10.1016/j.physc.2005.05.014

Thermal treatment effect of the oxidized La₂CuO _4+δ: The access of continuous and discontinuous T_c

L. H. Liu^*, G. C. Che, J. Zhao, Z. X. Zhao

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Superconductive La₂CuO_4+δ with T_c ∼ 40 K has been obtained by chemical oxidation using NaClO solution. The oxygen-decrease processes have been studied during the thermal treatment processes at different temperatures. The material separates into discrete phases with different transition temperatures for samples treated at 100 °C, consistent with the oxygenation process reported previously. However, T _c decreases continuously in samples treated at 300 °C, similar to the superconducting properties of La_2-xSr_xCuO ₄. In addition, the coexistence of superconducting and antiferromagnetic phases cannot be observed in our samples. The interrelation between the transition temperature and the treatment conditions such as temperature and time is discussed.

Original language	English
Pages (from-to)	37-43
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	425
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2005.05.014
Publication status	Published - 1 Sept 2005
Externally published	Yes

Keywords

La-based cuprates
Superconductivity
Transition temperature variations

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10.1016/j.physc.2005.05.014

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title = "Thermal treatment effect of the oxidized La2CuO 4+δ: The access of continuous and discontinuous Tc",

abstract = "Superconductive La2CuO4+δ with Tc ∼ 40 K has been obtained by chemical oxidation using NaClO solution. The oxygen-decrease processes have been studied during the thermal treatment processes at different temperatures. The material separates into discrete phases with different transition temperatures for samples treated at 100 °C, consistent with the oxygenation process reported previously. However, T c decreases continuously in samples treated at 300 °C, similar to the superconducting properties of La2-xSrxCuO 4. In addition, the coexistence of superconducting and antiferromagnetic phases cannot be observed in our samples. The interrelation between the transition temperature and the treatment conditions such as temperature and time is discussed.",

keywords = "La-based cuprates, Superconductivity, Transition temperature variations",

author = "Liu, {L. H.} and Che, {G. C.} and J. Zhao and Zhao, {Z. X.}",

year = "2005",

month = sep,

day = "1",

doi = "10.1016/j.physc.2005.05.014",

language = "English",

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journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Thermal treatment effect of the oxidized La2CuO 4+δ

T2 - The access of continuous and discontinuous Tc

AU - Liu, L. H.

AU - Che, G. C.

AU - Zhao, J.

AU - Zhao, Z. X.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - Superconductive La2CuO4+δ with Tc ∼ 40 K has been obtained by chemical oxidation using NaClO solution. The oxygen-decrease processes have been studied during the thermal treatment processes at different temperatures. The material separates into discrete phases with different transition temperatures for samples treated at 100 °C, consistent with the oxygenation process reported previously. However, T c decreases continuously in samples treated at 300 °C, similar to the superconducting properties of La2-xSrxCuO 4. In addition, the coexistence of superconducting and antiferromagnetic phases cannot be observed in our samples. The interrelation between the transition temperature and the treatment conditions such as temperature and time is discussed.

AB - Superconductive La2CuO4+δ with Tc ∼ 40 K has been obtained by chemical oxidation using NaClO solution. The oxygen-decrease processes have been studied during the thermal treatment processes at different temperatures. The material separates into discrete phases with different transition temperatures for samples treated at 100 °C, consistent with the oxygenation process reported previously. However, T c decreases continuously in samples treated at 300 °C, similar to the superconducting properties of La2-xSrxCuO 4. In addition, the coexistence of superconducting and antiferromagnetic phases cannot be observed in our samples. The interrelation between the transition temperature and the treatment conditions such as temperature and time is discussed.

KW - La-based cuprates

KW - Superconductivity

KW - Transition temperature variations

UR - http://www.scopus.com/inward/record.url?scp=23144459772&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2005.05.014

DO - 10.1016/j.physc.2005.05.014

M3 - Article

AN - SCOPUS:23144459772

SN - 0921-4534

VL - 425

SP - 37

EP - 43

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Thermal treatment effect of the oxidized La₂CuO _4+δ: The access of continuous and discontinuous T_c

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