Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2
Yakita, Hiroyuki · Ogino, Hiraku · Okada, Tomoyuki · Yamamoto, Akiyasu · Kishio, Kohji · Tohei, Tetsuya · Ikuhara, Yuichi · Gotoh, Yoshito · Fujihisa, Hiroshi · Kataoka, Kunimitsu · Eisaki, Hiroshi · Shimoyama, Jun-ichi
Original · EN
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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