Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2

Hiroyuki Yakita; Hiraku Ogino; Tomoyuki Okada; Akiyasu Yamamoto; Kohji Kishio; Tetsuya Tohei; Yuichi Ikuhara; Yoshito Gotoh; Hiroshi Fujihisa; Kunimitsu Kataoka; Hiroshi Eisaki; Jun-ichi Shimoyama

doi:10.1021/ja410845b

Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2

Superconductivity 2014-01-28 v1

Authors: Hiroyuki Yakita , Hiraku Ogino , Tomoyuki Okada , Akiyasu Yamamoto , Kohji Kishio , Tetsuya Tohei , Yuichi Ikuhara , Yoshito Gotoh , Hiroshi Fujihisa , Kunimitsu Kataoka , Hiroshi Eisaki , Jun-ichi Shimoyama

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Abstract

A new iron-based superconductor (Ca,Pr)FeAs2 was discovered. Plate-like crystals of the new phase were obtained and crystal structure was investigated by single-crystal X-ray diffraction analysis. The structure was identified as the monoclinic system with space group P21/m, and is composed of two Ca(Pr) planes, anti-fluorite Fe2As2 layers, and As2 zigzag chain layers. Plate-like crystals composed of the new phase showed superconductivity with Tc ~20 K in both magnetization and resistivity measurements.

Keywords

iron-based superconductor layered iron arsenide crystal structure single-crystal X-ray diffraction superconductivity CaFeAs2 Pr doping

Cite

@article{arxiv.1311.1302,
  title  = {Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2},
  author = {Hiroyuki Yakita and Hiraku Ogino and Tomoyuki Okada and Akiyasu Yamamoto and Kohji Kishio and Tetsuya Tohei and Yuichi Ikuhara and Yoshito Gotoh and Hiroshi Fujihisa and Kunimitsu Kataoka and Hiroshi Eisaki and Jun-ichi Shimoyama},
  journal= {arXiv preprint arXiv:1311.1302},
  year   = {2014}
}

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5 pages, 1 table, 6 figures

Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2

Abstract

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