Existence of the Minimum Coefficient in Temperature Linear Term of Heat Capacity in Superconducting (La1–xBax)2CuO4

Tatsuo Kobayashi; Satoshi Kumayasu; Kiichi Amaya; Kenji Ishida; Yoshio Kitaoka; Kunisuke Asayama

doi:10.1143/JPSJ.57.2261

Existence of the Minimum Coefficient in Temperature Linear Term of Heat Capacity in Superconducting (La_1–xBa_x)₂CuO₄

Tatsuo Kobayashi, Satoshi Kumayasu, Kiichi Amaya, Kenji Ishida, Yoshio Kitaoka, Kunisuke Asayama

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

1 Citation (Scopus)

Abstract

In high-T_c superconductors (La_1–xM_x)₂CuO₄ (M = Ba, Sr), it has been reported that the heat capacity has a nonzero coefficient γ in the temperature linear term. We investigated the detailed dependence of γ on Ba doping. It was confirmed that γ becomes zero for undoped La₂CuO₄. With increasing Ba concentration x, γ increases markedly up to x=0.02 where the magnetic order almost disappears, while it decreases as superconductivity starts to appear and then has a minimum around x=0.04. With further increasing x, γ increases again. These results may be due to a combined effect of two different contributions to γ.

Original language	English
Pages (from-to)	2261-2263
Number of pages	3
Journal	journal of the physical society of japan
Volume	57
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.57.2261
Publication status	Published - Jan 1 1988
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Existence of the Minimum Coefficient in Temperature Linear Term of Heat Capacity in Superconducting (La_1–xBa_x)₂CuO₄. / Kobayashi, Tatsuo; Kumayasu, Satoshi; Amaya, Kiichi; Ishida, Kenji; Kitaoka, Yoshio; Asayama, Kunisuke.

In: journal of the physical society of japan, Vol. 57, No. 7, 01.01.1988, p. 2261-2263.

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

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abstract = "In high-Tc superconductors (La1–xMx)2CuO4 (M = Ba, Sr), it has been reported that the heat capacity has a nonzero coefficient γ in the temperature linear term. We investigated the detailed dependence of γ on Ba doping. It was confirmed that γ becomes zero for undoped La2CuO4. With increasing Ba concentration x, γ increases markedly up to x=0.02 where the magnetic order almost disappears, while it decreases as superconductivity starts to appear and then has a minimum around x=0.04. With further increasing x, γ increases again. These results may be due to a combined effect of two different contributions to γ.",

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