Extreme sensitivity of the magnetic ground state to halide composition in FeCl3−xBrx

dc.contributorAalto Universityen
dc.contributor.authorCole, Andrewen_US
dc.contributor.authorStreeter, Alennaen_US
dc.contributor.authorOtero Fumega, Adolfoen_US
dc.contributor.authorYao, Xiaohanen_US
dc.contributor.authorWang, Zhi-Chengen_US
dc.contributor.authorFeng, Erxien_US
dc.contributor.authorCao, Huiboen_US
dc.contributor.authorLado, Joseen_US
dc.contributor.authorNagler, Stephen E.en_US
dc.contributor.authorTafti, Fazelen_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorCorrelated Quantum Materials (CQM)en
dc.contributor.organizationBoston Collegeen_US
dc.contributor.organizationOak Ridge National Laboratoryen_US
dc.description.abstractMixed halide chemistry has recently been utilized to tune the intrinsic magnetic properties of transition-metal halides—one of the largest families of magnetic van der Waals materials. Prior studies have shown that the strength of exchange interactions, hence the critical temperature, can be tuned smoothly with halide composition for a given ground state. Here we show that the ground state itself can be altered by a small change of halide composition in FeCl3−xBrx. Specifically, we find a threefold jump in the Néel temperature and a sign change in the Weiss temperature at x=0.08 corresponding to only 3% bromine doping. Using neutron scattering, we reveal a change of the ground state from spiral order in FeCl3 to A-type antiferromagnetic order in FeBr3. From first-principles calculations, we show that a delicate balance between nearest and next-nearest neighbor interactions is responsible for such a transition. These results demonstrate how varying the halide composition can tune the competing interactions and change the ground state of a spiral spin liquid system.en
dc.description.versionPeer revieweden
dc.identifier.citationCole, A, Streeter, A, Otero Fumega, A, Yao, X, Wang, Z-C, Feng, E, Cao, H, Lado, J, Nagler, S E & Tafti, F 2023, ' Extreme sensitivity of the magnetic ground state to halide composition in FeCl3−xBrx ', Physical Review Materials, vol. 7, no. 6, 064401, pp. 1-6 . https://doi.org/10.1103/PhysRevMaterials.7.064401en
dc.identifier.otherPURE UUID: c1dbd0a6-c535-42df-9196-2fab022eb96den_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/c1dbd0a6-c535-42df-9196-2fab022eb96den_US
dc.identifier.otherPURE LINK: https://arxiv.org/abs/2303.02238en_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/112646433/Extreme_sensitivity_of_the_magnetic_ground_state_to_halide_composition_in_FeCl3_xBrx.pdfen_US
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Materialsen
dc.relation.ispartofseriesVolume 7, issue 6en
dc.titleExtreme sensitivity of the magnetic ground state to halide composition in FeCl3−xBrxen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi