Effect of magnetic field on the superconducting phase in the electron-doped metallic double-chain compound Pr2Ba4Cu7O 15-δ

Taiji Chiba, Michiaki Matsukawa, Junki Tada, Satoru Kobayashi, Makoto Hagiwara, Tsuyoshi Miyazaki, Kazuhiro Sano, Yoshiaki Öno, Takahiko Sasaki, Jun Ichi Echigoya

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4 Citations (Scopus)

Abstract

We report the magnetotransport and dc magnetic susceptibility of the polycrystalline samples of Pr2Ba4Cu7O 15-δ, to examine the effect of magnetic field on the superconducting phase of the metallic CuO double-chain. The resistive critical magnetic field is estimated to be about 21 T at low temperatures from the resistive transition data. On the other hand, the corresponding critical field determined from the magnetization measurements gives rise to a very low value of ̃0.3 T at 2 K. These discrepancies in the magnetic response between the resistivity and magnetization data are caused by disappearance of the magnetically shielding effect even in relatively lower fields. In spite of the observation of the resistive drop associated with the superconducting transport currents, the suppression of the diamagnetic signal is probably related to the superconductivity of quasi one-dimensional CuO double-chain. The behavior of Seebeck coefficient in the superconducting Pr2Ba4Cu 7O15-δ is discussed on the basis of the double chain model from the density functional band calculation.

Original languageEnglish
Article number074706
Journaljournal of the physical society of japan
Volume82
Issue number7
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • CuO double-chain
  • Magnetic phase diagram
  • PrBaCuO
  • Superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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