Bovo, L;
Twengstrom, M;
Petrenko, OA;
Fennell, T;
Gingras, MJP;
Bramwell, ST;
Henelius, P;
(2018)
Special temperatures in frustrated ferromagnets.
Nature Communications
, 9
, Article 1999. 10.1038/s41467-018-04297-3.
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Abstract
The description and detection of unconventional magnetic states, such as spin liquids, is a recurring topic in condensed matter physics. While much of the efforts have traditionally been directed at geometrically frustrated antiferromagnets, recent studies reveal that systems featuring competing antiferromagnetic and ferromagnetic interactions are also promising candidate materials. We find that this competition leads to the notion of special temperatures, analogous to those of gases, at which the competing interactions balance, and the system is quasi-ideal. Although induced by weak perturbing interactions, these special temperatures are surprisingly high and constitute an accessible experimental diagnostic of eventual order or spin-liquid properties. The well characterised Hamiltonian and extended low-temperature susceptibility measurement of the canonical frustrated ferromagnet Dy2Ti2O7 enables us to formulate both a phenomenological and microscopic theory of special temperatures for magnets. Other members of this class of magnets include kapellasite Cu3Zn(OH)6Cl2 and the spinel GeCo2O4.
| Type: | Article |
|---|---|
| Title: | Special temperatures in frustrated ferromagnets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-018-04297-3 |
| Publisher version: | https://doi.org/10.1038/s41467-018-04297-3 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, SPIN ICE, MONTE-CARLO, ANTIFERROMAGNET, CRYSTAL, STATE, MODEL, SUSCEPTIBILITY, DY2TI2O7, HO2TI2O7, MAGNETS |
| 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 UCL > Provost and Vice Provost Offices > VP: Innovation and Enterprise UCL > Provost and Vice Provost Offices > VP: Innovation and Enterprise > Business and Innovation Partnerships |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10049950 |
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