Abstract
Co3In2S2 is a shandite phase closely related to the ferromagnetic Weyl semimetal Co3Sn2S2 and contains Co atoms on an ideal kagome net. Elemental substitutions in Co3Sn2S2 have been shown to invariably suppress its magnetism, and it remains a rare example of a shandite phase with magnetic order. Here, we report a new magnetic shandite compound discovered by substituting Fe into Co3In2S2. Single crystals of (Co1–xFex)3In2S2 were grown, and neutron diffraction, ac and dc magnetization, and heat capacity measurements reveal long-range antiferromagnetic order with an interesting noncollinear structure and transition temperatures from 11 to 17 K. Partially substituting Fe for Co was inspired by calculated electronic structures, which suggest that Co3In2S2 is near a magnetic instability and shows a peak in the density of states that can be approached by hole doping. While the focus of the present work is primarily on magnetism, there is a nodal ring below the Fermi energy in Co3In2S2 that may also provide interest from a topological perspective. Potentially related to this, we find large, linear, nonsaturating magnetoresistance in this compound. This work expands the scope of magnetic topological materials among shandites and motivates similar chemical manipulation studies to reveal hidden magnetic instabilities in this important family and other topological systems.
| Original language | English |
|---|---|
| Pages (from-to) | 9741-9749 |
| Number of pages | 9 |
| Journal | Chemistry of Materials |
| Volume | 33 |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 28 2021 |
Funding
The authors thank Jiaqiang Yan, Andrew May, Joe Paddison, and David Parker for helpful discussions. This material is based on the work supported by the U.S. Department of Energy (DOE), Office of Science, National Quantum Information Science Research Centers, Quantum Science Center (M.A.M. and M.Y.), with early stages supported by the Laboratory Directed Research and Development Program (LDRD) of Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC, for the U.S. DOE Office of Science. W.L. acknowledges support from the U.S. DOE, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. A portion of this research used resources at the Spallation Neutron Source (SNS), a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory, and resources of the SNS Second Target Station Project (Q.Z. and Y.L.). This research used the ESM beamline at the National Synchrotron Light Source II, a U.S. DOE Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under contract no. DE-SC0012704 (T.Y. and E.V.). This research used resources of the Oak Ridge Leadership Computing Facility and the National Energy Research Scientific Computing Center, DOE Office of Science User Facilities. This manuscript has been authored by UT-Battelle, LLC, under contract no. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). Acknowledgments
| Funders | Funder number |
|---|---|
| Andrew May, Joe Paddison | |
| Jiaqiang Yan | |
| National Quantum Information Science Research Centers | |
| Quantum Science Center | |
| U.S. Department of Energy | |
| Office of Science | |
| Basic Energy Sciences | |
| Oak Ridge National Laboratory | |
| Brookhaven National Laboratory | DE-SC0012704 |
| Division of Materials Sciences and Engineering | |
| National Energy Research Scientific Computing Center |