Synthesis and physical properties of Ca1-xRExFeAs2 with RE = La ~ Gd

Alberto Sala; Hiroyuki Yakita; Hiraku Ogino; Tomoyuki Okada; Akiyasu Yamamoto; Kohji Kishio; Shigeyuki Ishida; Akira Iyo; Hiroshi Eisaki; Masaya Fujioka; Yoshihiko Takano; Marina Putti; Jun-ichi Shimoyama

doi:10.7567/APEX.7.073102

Synthesis and physical properties of Ca1-xRExFeAs2 with RE = La ~ Gd

Superconductivity 2014-06-27 v1

Authors: Alberto Sala , Hiroyuki Yakita , Hiraku Ogino , Tomoyuki Okada , Akiyasu Yamamoto , Kohji Kishio , Shigeyuki Ishida , Akira Iyo , Hiroshi Eisaki , Masaya Fujioka , Yoshihiko Takano , Marina Putti , Jun-ichi Shimoyama

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Abstract

Synthesis of a series of layered iron arsenides Ca1-xRExFeAs2 (112) was attempted by heating at 1000 C under a high-pressure of 2 GPa. The 112 phase successfully forms with RE = La, Ce, Nd, Sm, Eu and Gd, while Tb, Dy and Ho substituted and RE free samples does not contain the 112 phase. The Ce, Nd, Sm, Eu and Gd doped Ca1-xRExFeAs2 are new compounds. All of them exhibit superconducting transition except for the Ce doped sample. The behaviour of the critical temperature, with the RE ionic radii have been investigated.

Keywords

layered iron arsenides superconducting transition high-pressure synthesis 112 phase rare earth doping critical temperature

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@article{arxiv.1404.2738,
  title  = {Synthesis and physical properties of Ca1-xRExFeAs2 with RE = La ~ Gd},
  author = {Alberto Sala and Hiroyuki Yakita and Hiraku Ogino and Tomoyuki Okada and Akiyasu Yamamoto and Kohji Kishio and Shigeyuki Ishida and Akira Iyo and Hiroshi Eisaki and Masaya Fujioka and Yoshihiko Takano and Marina Putti and Jun-ichi Shimoyama},
  journal= {arXiv preprint arXiv:1404.2738},
  year   = {2014}
}

Synthesis and physical properties of Ca1-xRExFeAs2 with RE = La ~ Gd

Abstract

Keywords

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