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Observation of a C-type Short-Range Antiferromagnetic Order in Lyaer Spacing Expanded FeS



Meng Wang, Ming Yi, Benjamin A. Frandsen, Junjie Yin, Hualei Sun, Zhijun Xu, Huibo Cao, Edith Bourret-Courchesne, Jeffrey W. Lynn, Robert J. Birgeneau


We report neutron diffraction studies of FeS single crystals obtained from RbxFe2-yS2 single crystals via a hydrothermal method. While no √5 x √5 iron vacancy order or block antiferromagnetic order typical of RRbxFe2-yS2 is found in our samples, we observe C-type short range antiferromagnetic order with moments pointed along the c-axis hosted by a new phase of FeS with an expanded inter-layer spacing. The Neel temperature for this magnetic order is determined to be 165 K. Our finding of a variant FeS structure hosting this C-type antiferromagnetic order demonstrates that the known FeS phase synthesized in this method is in the vicinity of a magnetically ordered ground state, providing insights into understanding a variety of phenomena observed in FeS and the related FeSe1-xSx iron chalcogenide system.
Physical Review Materials


FeS family of superconductors, Neel temperature 165 K, C-type magnetic structure, Neutron diffraction


Wang, M. , Yi, M. , Frandsen, B. , Yin, J. , Sun, H. , Xu, Z. , Cao, H. , Bourret-Courchesne, E. , Lynn, J. and Birgeneau, R. (2020), Observation of a C-type Short-Range Antiferromagnetic Order in Lyaer Spacing Expanded FeS, Physical Review Materials, [online], (Accessed April 13, 2024)
Created March 8, 2020, Updated October 12, 2021