Connolly, ET;
Reeves, P;
Boldrin, D;
Wills, AS;
(2018)
Synthesis, structure and magnetism of the new S=1 kagome magnet NH4Ni2.5V2O7(OH)(2) center dot H2O.
Journal of Physics: Condensed Matter
, 30
(2)
10.1088/1361-648X/aa9d64.
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Abstract
Kagome antiferromagnets (KAFMs) have long been known to host exotic electronic states due to their strong geometric frustration, including the quantum spin liquid (QSL) state in S = 1/2 systems. Away from that limit, S = 1 KAFMs are also predicted to host unconventional ground states, such as spin nematic phases, but a paucity of studies on known model materials has restricted progress. Here, we present the crystal structure and preliminary magnetization measurements on the newly synthesized S = 1 KAFM, NH4Ni2.5V2O7(OH)2.H2O, which has the 3- fold symmetry of the kagome lattice but significant site depletion, with ∼ 77 % site occupancy. Bulk magnetic data show clear evidence of frustration and competition between ferromagnetic and antiferromagnetic interactions. We propose that the magnetic Hamiltonian is frustrated and that anisotropic terms cause the formation of an unconventional ground state.
| Type: | Article |
|---|---|
| Title: | Synthesis, structure and magnetism of the new S=1 kagome magnet NH4Ni2.5V2O7(OH)(2) center dot H2O |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-648X/aa9d64 |
| Publisher version: | https://doi.org/10.1088/1361-648X/aa9d64 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, Nickel Vanadates, Competing Exchange, S=1 Systems, Frustrated Magnets, Crystal-Structure, Spin Liquids, Antiferromagnet, Lattice, State, Excitations, Volborthite |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10053202 |
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