Abstract
Growth parameters play a significant role in the crystal quality and physical properties of layered materials. Here we present a case study on a van der Waals magnetic NbFeTe2 material. Two different types of polymorphic NbFeTe2 phases, synthesized at different temperatures, display significantly different behaviors in crystal symmetry, electronic structure, electrical transport, and magnetism. While the phase synthesized at low temperature showing behavior consistent with previous reports, the new phase synthesized at high temperature, has completely different physical properties, such as metallic resistivity, long-range ferromagnetic order, anomalous Hall effect, negative magnetoresistance, and distinct electronic structures. Neutron diffraction reveals out-of-plane ferromagnetism below 70 K, consistent with the electrical transport and magnetic susceptibility studies. Our work suggests that simply tuning synthetic parameters in a controlled manner could be an effective route to alter the physical properties of existing materials potentially unlocking new states of matter, or even discovering new materials.
| Original language | English |
|---|---|
| Article number | 174427 |
| Journal | Physical Review B |
| Volume | 109 |
| Issue number | 17 |
| DOIs | |
| State | Published - May 1 2024 |
Funding
This work at the University of Texas at Dallas is supported by the US Air Force Office of Scientific Research (AFOSR) Grant No. FA9550-19-1\u20130037, National Science Foundation (NSF) (DMREF-1921581) and Office of Naval Research (ONR) Grant No. N00014-23-1\u20132020. Part of our measurement facilities acknowledge the support from the AFOSR Defense University Research Instrumentation Program (DURIP) Grant No. FA9550-21-1\u20130297. The ARPES work at Rice University was supported by the Robert A. Welch Foundation Grant No. C-2175 and the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant No. GBMF9470. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under Contract No. DE-AC02-05CH11231. Y.G. was supported in part by an ALS Doctoral Fellowship in Residence. L.Y. is supported by NSF DMREF DMR-2118779. The simulation used Anvil at Purdue University through allocation DMR100005 from the Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support (ACCESS) program, which is supported by National Science Foundation Grants No. 2138259, No. 2138286, No. 2138307, No. 2137603, and No. 2138296. A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.