CuFeAs: A New Member in the 111-Family of Iron-Pnictides
arXiv:1410.0805 · doi:10.7566/JPSJ.83.054706
Abstract
We have synthesized CuFeAs, a new iron-pnictide compound with a layered tetragonal Cu2Sb type structure (space group P4/nmm: a = b = 3.7442(2) Å and c = 5.8925(4) Å) that is identical to that of 111-type iron-based superconductors. Our measurements suggest that in low applied magnetic field it undergoes an antiferromagnetic transition below TN ~ 9 K. When compared with the ground state of CuFeSb, recently reported 111-type ferromagnetic material (TC ~ 375 K), it has important implication with regard to the nature of Fe-Fe magnetic interaction in Fe-As materials. CuFeAs does not exhibit superconductivity down to 2 K.
8 pages, 5 figures
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