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Fluctuations and all-in–all-out ordering in Dipole-Octupole Nd2Zr2O7

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Lhotel, Elsa, Petit, Sylvain, Guitteny, S., Florea, O., Ciomaga Hatnean, Monica, Colin, C., Ressouche, E., Lees, Martin R. and Balakrishnan, G. (2015) Fluctuations and all-in–all-out ordering in Dipole-Octupole Nd2Zr2O7. Physical Review Letters, 115 (19). 197202. doi:10.1103/PhysRevLett.115.197202

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.115.197202

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Abstract

By means of neutron scattering and magnetization measurements down to 90 mK, we determine the magnetic ground state of the spin-ice candidate Nd2Zr2O7. We show that, despite ferromagnetic interactions, Nd2Zr2O7 undergoes a transition around 285 mK towards an all-in–all-out antiferromagnetic state, with a strongly reduced ordered magnetic moment.We establish the (H,T) phase diagram in the three directions of the applied field and reveal a metamagnetic transition around 0.1 T, associated with an unexpected shape of the magnetization curves.We propose that this behavior results from the peculiar nature of the Nd3þ doublet, a dipolar-octupolar doublet, different from the standard Kramers doublet studied to date, thus revealing the importance of multipolar correlations in the properties of pyrochlore oxides.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Physics., Magnetism., Neutrons -- Scattering.
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 4 November 2015
Dates:
DateEvent
4 November 2015Published
4 November 2015Accepted
Volume: 115
Number: 19
Article Number: 197202
DOI: 10.1103/PhysRevLett.115.197202
Status: Peer Reviewed
Publication Status: Published
Copyright Holders: American Physical Society
Funder: Engineering and Physical Sciences Research Council (EPSRC), Laboratoire d’Alliances Nanosciences-Énergies du Futur (LANEF)
Grant number: EP/M028771/1

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