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arxiv: 1311.1302 · v1 · pith:JMLCWMUUnew · submitted 2013-11-06 · ❄️ cond-mat.supr-con

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
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Hiroshi Fujihisa Kunimitsu Kataoka Hiroshi Eisaki Jun-ichi Shimoyama
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classification ❄️ cond-mat.supr-con
keywords composedcrystalsfeas2layersphaseplate-likestructuresuperconductor
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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.

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