Thermodynamic properties of superconducting and non-superconducting Pr2Ba4Cu7O15 - δ compounds with metallic double chains

Takahisa Konno, Michiaki Matsukawa, Keisuke Sugawara, Haruka Taniguchi, Junichi Echigoya, Akiyuki Matsushita, Makoto Hagiwara, Kazuhiro Sano, Yoshiaki Ohno, Yuh Yamada, Takahiko Sasaki, Yuichiro Hayasaka

研究成果: Article査読

1 被引用数 (Scopus)

抄録

To examine the thermodynamic properties of Pr2Ba4Cu7O15-δ compounds with metallic CuO double chains, we measured the specific heats of superconducting and non-superconducting polycrystalline samples at low temperatures (1.8-40 K) under various magnetic fields (up to 9 T). In the as-sintered non-superconducting sample, a λ-like enhancement in the specific heat measurement appeared near the antiferromagnetic transition temperature TN=17 K. In contrast, the reduced superconducting sample with Tcon=26.5 K exhibited no obvious superconducting anomaly in its specific heat data, but a Schottky-like broad maximum appeared at low temperatures. The Schottky-like anomaly was attributed to low-lying quasi-triplet splitting of Pr3+ ions under the crystal field effect.

本文言語English
ページ(範囲)13-17
ページ数5
ジャーナルPhysica C: Superconductivity and its applications
521-522
DOI
出版ステータスPublished - 2016 2月 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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