Large-moment antiferromagnetic order in overdoped high-T_c superconductor ¹⁵⁴SmFeAsO_1-x D _x.

ABSTRACT: In iron-based superconductors, high critical temperature (T_c) superconductivity over 50 K has only been accomplished in electron-doped hREFeAsO (hRE is heavy rare earth (RE) element). Although hREFeAsO has the highest bulk T_c (58 K), progress in understanding its physical properties has been relatively slow due to difficulties in achieving high-concentration electron doping and carrying out neutron experiments. Here, we present a systematic neutron powder diffraction study of ¹⁵⁴SmFeAsO_1-x D _x , and the discovery of a long-range antiferromagnetic ordering with x ≥ 0.56 (AFM2) accompanying a structural transition from tetragonal to orthorhombic. Surprisingly, the Fe magnetic

SUBMITTER: Iimura S 

PROVIDER: S-EPMC5465885 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature