Enhanced Superconductivity up to 43 K by P/Sb Doping of Ca1-xLaxFeAs2

Daisuke Mitsuoka; Kazunori Fujimura; Kazutaka Kudo; Keita Iba; Minoru Nohara; Naoki Nishimoto; Tasuku Mizukami; Yuji Hiraoka; Yutaka Kitahama

arxiv: 1311.1269 · v2 · pith:HWGTNO5Pnew · submitted 2013-11-06 · ❄️ cond-mat.supr-con · cond-mat.str-el

Enhanced Superconductivity up to 43 K by P/Sb Doping of Ca1-xLaxFeAs2

Kazutaka Kudo , Tasuku Mizukami , Yutaka Kitahama , Daisuke Mitsuoka , Keita Iba , Kazunori Fujimura , Naoki Nishimoto , Yuji Hiraoka

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Minoru Nohara

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords dopingfeas2ca1-xlaxfeas2exhibitedarsenideca-fe-asconductingdoped

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The effects of isovalent doping on the superconducting transition temperature Tc in novel 112-type iron arsenide Ca1-xLaxFeAs2 were studied by conducting measurements of electrical resistivity rho and magnetization M. P or Sb doping strongly enhances Tc: P-doped Ca0.84La0.16FeAs2 and Sb-doped Ca0.85La0.15FeAs2 exhibited Tc of 41 and 43 K, respectively, while Ca0.85La0.15FeAs2 without P/Sb exhibited Tc = 35 K. These observations will give a hint for further enhancing Tc of rare-earth doped Ca-Fe-As systems.

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Enhanced Superconductivity up to 43 K by P/Sb Doping of Ca1-xLaxFeAs2

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