Preparation and superconducting properties of tetragonal ba2ycu3o7-yand ba2eucu3o7-ywith low oxygen-defect concentration (0.05<y<0.20)

Kyoichi Kinoshita, Azusa Matsuda, Takao Ishii, Naobumi Suzuki, Hiroyuki Shibata, Takao Watanabe, Tomoaki Yamada

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Tetragonal phases of Ba2YCu3O7-yand Ba2EuCu3O7-ywith low oxygen-defect concentration (0.05<y<0.20) are prepared by synthesis under high oxygen pressure (3–8 atms). As oxygen pressure increases during sintering, the crystal structure of synthesized samples changes from the orthorhombic to tetragonal phase and superconductivity is suppressed. substitution of Y and Eu for Ba is observed to accompany the change to the tetragonal phase. Disordering of oxygen vacancies and such substitution may be vital for the absence of superconductivity because no strong correlation between Tcand oxygen-defect concentration is observed.

本文言語English
ページ(範囲)L795-L798
ジャーナルJapanese journal of applied physics
27
5A
DOI
出版ステータスPublished - 1988 5
外部発表はい

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

フィンガープリント 「Preparation and superconducting properties of tetragonal ba<sub>2</sub>ycu<sub>3</sub>o<sub>7-y</sub>and ba<sub>2</sub>eucu<sub>3</sub>o<sub>7-y</sub>with low oxygen-defect concentration (0.05<y<0.20)」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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