A New Layered Iron Arsenide Superconductor: (Ca,Pr)FeAs2

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• 作者：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
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：January 22, 2014
• 年：2014
• 卷：136
• 期：3
• 页码：846-849
• 全文大小：287K
• ISSN：1520-5126

文摘

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