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

Published

March 9, 2020

Author(s)

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

Abstract

We report neutron diffraction studies of FeS single crystals obtained from Rb_xFe_2-yS₂ single crystals via a hydrothermal method. While no √5 x √5 iron vacancy order or block antiferromagnetic order typical of RRb_xFe_2-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 FeSe_1-xS_x iron chalcogenide system.

Citation

Physical Review Materials

Volume

4

Issue

3

Pub Type

Journals

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Keywords

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

Citation

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], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928811 (Accessed October 21, 2025)