(Ca,RE)FeAs2烧结块体的Co共掺杂效应
超导电性
2015-05-28 v1
摘要
研究了Co共掺杂(Ca,RE)FeAs2 ((Ca,RE)112: RE = La, Pr)的超导性质。Co共掺杂提升了(Ca,Pr)112的Tc，而Mn共掺杂抑制了(Ca,RE)112的超导性。Co共掺杂(Ca,La)112显示出比无Co(Ca,La)112更大的抗磁屏蔽与更尖锐的超导转变。电阻测量中观测到的Tczero从14 K升至30 K，而Tconset未升高。Co共掺杂(Ca,La)112的临界电流密度(Jc)在2 K与25 K近零场下分别约为2.1×10^4 Acm-2与3.2×10^3 Acm-2。对于这些多晶块体，观测到的相对较高Jc与较大抗磁屏蔽表明Co共掺杂(Ca,RE)112化合物具有块体超导性。
引用
@article{arxiv.1505.07242,
title = {Co-co-doping effect for (Ca,RE)FeAs2 sintered bulk},
author = {Hiroyuki Yakita and Hiraku Ogino and Alberto Sala and Tomoyuki Okada and Kohji Kishio and Akira Iyo and Hiroshi Eisaki and Jun-ichi Shimoyama},
journal= {arXiv preprint arXiv:1505.07242},
year = {2015}
}