Specific heat of YBa2Cu3O7-δ and BaCuO2+x in magnetic fields up to 6 T

T. Sasaki, O. Nakatsu, N. Kobayashi, A. Tokiwa, M. Kikuchi, A. Liu, K. Hiraga, Y. Syono, Y. Muto

研究成果: Article

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The specific heat C of YBa2Cu3O7-δ (δ=0, 0.69, 0.91), Y1.1Ba1.9Cu3O7-δ and BaCuO2+x has been investigated in magnetic fields up to 6 T. In addition to the γ*T term and the upturn, characteristic behaviors of C/T consisting of the increase of γ* with magnetic fields, an appearance of a broad hump and a rapid decrease of C/T toward zero at the lowest temperatures are observed in all the YBa2Cu3O7-δ samples investigated. BaCuO2+x, one of the possible impurity phases included in the Y-Ba-Cu-O system, also shows a similar behavior of C/T as YBa2Cu3O7-δ. Particularly, BaCuO2+x explains the anomalous phenomenon observed in YBa2Cu3O6.31 at 6 T that the C/T at 1.5 K attains to the γ* value at 0 T. The γ* value is attributed to the BaCuO2+x included in the matrix.

元の言語English
ページ(範囲)395-404
ページ数10
ジャーナルPhysica C: Superconductivity and its applications
156
発行部数3
DOI
出版物ステータスPublished - 1988 10 1

ASJC Scopus subject areas

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

フィンガープリント Specific heat of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> and BaCuO<sub>2+x</sub> in magnetic fields up to 6 T' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Sasaki, T., Nakatsu, O., Kobayashi, N., Tokiwa, A., Kikuchi, M., Liu, A., Hiraga, K., Syono, Y., & Muto, Y. (1988). Specific heat of YBa2Cu3O7-δ and BaCuO2+x in magnetic fields up to 6 T. Physica C: Superconductivity and its applications, 156(3), 395-404. https://doi.org/10.1016/0921-4534(88)90763-0