Manson, JL;
Manson, ZE;
Sargent, A;
Villa, DY;
Etten, NL;
Blackmore, WJA;
Curley, SPM;
... Singleton, J; + view all
(2020)
Enhancing easy-plane anisotropy in bespoke Ni(II) quantum magnets.
Polyhedron
, 180
, Article 114379. 10.1016/j.poly.2020.114379.
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Abstract
We examine the crystal structures and magnetic properties of several S = 1 Ni(II) coordination compounds, molecules and polymers, that include the bridging ligands HF2−, AF62− (A = Ti, Zr) and pyrazine or non-bridging ligands F−, SiF62−, glycine, H2O, 1-vinylimidazole, 4-methylpyrazole and 3-hydroxypyridine. Pseudo-octahedral NiN4F2, NiN4O2 or NiN4OF cores consist of equatorial Ni-N bonds that are equal to or slightly longer than the axial Ni-Lax bonds. By design, the zero-field splitting (D) is large in these systems and, in the presence of substantial exchange interactions (J), can be difficult to discriminate from magnetometry measurements on powder samples. Thus, we relied on pulsed-field magnetization in those cases and employed electron-spin resonance (ESR) to confirm D when J ≪ D. The anisotropy of each compound was found to be easy-plane (D > 0) and range from ≈ 8–25 K. This work reveals a linear correlation between the ratio d(Ni-Lax)/d(Ni-Neq) and D although the ligand spectrochemical properties may play an important role. We assert that this relationship allows us to predict the type of magnetocrystalline anisotropy in tailored Ni(II) quantum magnets.
| Type: | Article |
|---|---|
| Title: | Enhancing easy-plane anisotropy in bespoke Ni(II) quantum magnets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.poly.2020.114379 |
| Publisher version: | https://doi.org/10.1016/j.poly.2020.114379 |
| Language: | English |
| Additional information: | Copyright © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
| Keywords: | Quantum magnetism, Anisotropy, Low-dimensional, High magnetic fields, Nickel |
| 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 Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10093181 |
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