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Unprecedented high irreversibility line in the nontoxic cuprate superconductor (Cu,C)Ba2Ca3Cu4O11+?.

ABSTRACT: One of the key factors that limit the high-power applications for a type II superconductor is the irreversibility line H irr(T), which reflects the very boundary of resistive dissipation in the phase diagram of magnetic field versus temperature. In cuprate family, the Y-, Bi-, Hg-, and Tl-based systems have superconducting transition temperatures exceeding the liquid nitrogen boiling temperature (~77 K). However, the toxic elements Hg and Tl in the latter two systems strongly constrain the applications. The best perspective so far is relying on the YBa2Cu3O7-? (T c ? 90 K) system, which is nontoxic and has a relatively high irreversibility magnetic field. We report the study of a nontoxic superconductor (Cu,C)Ba2Ca3Cu4O11+? with T c = 116 K. We found that the irreversibility magnetic field is extremely high, and it thus provides great potential for applications above the liquid nitrogen temperature.

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC6162075 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Unprecedented high irreversibility line in the nontoxic cuprate superconductor (Cu,C)Ba<sub>2</sub>Ca<sub>3</sub>Cu<sub>4</sub>O<sub>11+δ</sub>.

Zhang Yue Y   Liu Wenhao W   Zhu Xiyu X   Zhao Haonan H   Hu Zheng Z   He Chengping C   Wen Hai-Hu HH  

Science advances 20180928 9

One of the key factors that limit the high-power applications for a type II superconductor is the irreversibility line <i>H</i> <sub>irr</sub>(<i>T</i>), which reflects the very boundary of resistive dissipation in the phase diagram of magnetic field versus temperature. In cuprate family, the Y-, Bi-, Hg-, and Tl-based systems have superconducting transition temperatures exceeding the liquid nitrogen boiling temperature (~77 K). However, the toxic elements Hg and Tl in the latter two systems str  ...[more]

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