Connolly, ET;
Wardell, J;
Boldrin, D;
Tang, CC;
Wills, AS;
(2024)
Structural and magnetic studies of the frustrated S = 1 kagome magnet NH4Ni2Mo2O10H3.
Journal of Physics: Condensed Matter
, 36
(22)
, Article 225802. 10.1088/1361-648X/ad2aab.
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Abstract
The strong geometric frustration of the kagome antiferromagnets (KAFMs) can destabilise conventional magnetic order and lead to exotic electronic states, such as the quantum spin-liquid state observed in some S = 1 2 KAFM materials. However, the ground state of S = 1 KAFM systems are less well understood. Spin nematic phases and valence bond solid ground states have been predicted to form but a paucity of experimental realisations restricts understanding. Here, the S = 1 KAFM NH4Ni2Mo2O10H3 is presented, which has the 3-fold symmetry of the kagome lattice but significant site depletion, with ∼64% site occupancy. Frustration and a competition between exchange interactions are evidenced through the suppression of order below the Weiss temperature |θW| and observation of ferromagnetic and antiferromagnetic characteristics in the magnetisation data. A semi spin glass ground state is predicted based on the ac-field frequency dependence of the magnetic transition and ferromagnetic signal.
| Type: | Article |
|---|---|
| Title: | Structural and magnetic studies of the frustrated S = 1 kagome magnet NH4Ni2Mo2O10H3 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-648X/ad2aab |
| Publisher version: | http://doi.org/10.1088/1361-648X/ad2aab |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| Keywords: | geometrically frustrated magnetism, S = 1 kagome magnet, canted local states, semi spin glass |
| 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/10190490 |
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