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Title: Magnetic state of pyrochlore Cd2Os2O7 emerging from strong competition of ligand distortions and longer-range crystalline anisotropy
Authors: Bogdanov, Nikolay A.
Maurice, Remi
Rousochatzakis, Ioannis
van den Brink, Jeroen
Hozoi, Liviu
Issue Date: 2013
Publisher: © American Physical Society
Citation: BOGDANOV, N.A. ... et al, 2013. Magnetic state of pyrochlore Cd2Os2O7 emerging from strong competition of ligand distortions and longer-range crystalline anisotropy. Physical Review Letters, 110 (12), 127206.
Abstract: By many-body quantum-chemical calculations, we investigate the role of two structural effects - local ligand distortions and the anisotropic Cd-ion coordination - on the magnetic state of Cd2Os2O7, a spin S=3/2 pyrochlore. We find that these effects strongly compete, rendering the magnetic interactions and ordering crucially dependent on these geometrical features. Without trigonal distortions, a large easy-plane magnetic anisotropy develops. Their presence, however, reverses the sign of the zero-field splitting and causes a large easy-axis anisotropy (D-6.8 meV), which in conjunction with the antiferromagnetic exchange interaction (Ja6.4 meV) stabilizes an all-in-all-out magnetic order. The competition uncovered here is a generic feature of pyrochlore magnets.
Description: This paper was published in the journal Physical Review Letters and the definitive published version is available at https://doi.org/10.1103/PhysRevLett.110.127206.
Sponsor: N. A. B. and L. H. acknowledge financial support from the Erasmus Mundus Programme of the European Union and the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG), respectively.
Version: Accepted for publication
DOI: 10.1103/PhysRevLett.110.127206
URI: https://dspace.lboro.ac.uk/2134/34514
Publisher Link: https://doi.org/10.1103/PhysRevLett.110.127206
ISSN: 0031-9007
Appears in Collections:Published Articles (Physics)

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