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Special temperatures in frustrated ferromagnets

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Bovo, L., Twengström, M., Petrenko, Oleg, Fennell, T., Gingras, M. J. P., Bramwell, S. T. and Henelius, P. (2018) Special temperatures in frustrated ferromagnets. Nature Communications, 9 (1). 1999. doi:10.1038/s41467-018-04297-3 ISSN 2041-1723.

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Official URL: http://dx.doi.org/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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Condensed matter, Ferromagnetism, Ferromagnetic materials
Journal or Publication Title: Nature Communications
Publisher: Springer Nature
ISSN: 2041-1723
Official Date: 21 May 2018
Dates:
DateEvent
21 May 2018Published
18 April 2018Accepted
30 January 2018Submitted
Volume: 9
Number: 1
Article Number: 1999
DOI: 10.1038/s41467-018-04297-3
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Copyright Holders: Springer Nature
Date of first compliant deposit: 21 May 2018
Date of first compliant Open Access: 22 May 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
2013-03968Vetenskapsrådethttp://dx.doi.org/10.13039/501100004359
2014/807Stiftelsen Olle Engkvist Byggmästarehttp://dx.doi.org/10.13039/501100004200
ECF2014-284Leverhulme Trusthttp://dx.doi.org/10.13039/501100000275
UNSPECIFIEDCanada Research Chairshttp://dx.doi.org/10.13039/501100001804
UNSPECIFIEDPerimeter Institute for Theoretical Physicshttp://viaf.org/viaf/125450453
UNSPECIFIEDInnovation, Science and Economic Development Canadahttp://dx.doi.org/10.13039/100011332
UNSPECIFIEDMinistry of Research, Innovation and Sciencehttp://dx.doi.org/10.13039/501100003400
Open Access Version:
  • https://www.nature.com/articles/s41467-0...

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