Defects and spin correlations in yttrium-doped spin ice

DOI

Excitations in spin ice fractionalize into de-confined magnetic monopoles that interact with each other via the magnetic Coulomb interaction. Substituting rare earth ions with nonmagnetic yttrium is predicted to introduce static monopole pairs in the dilute limit, and leads to a dipolar spin glass transition at high concentration. We are able to model the heat capacity and spin correlations for low concentrations, but for high concentrations the theory is unable to account for the heat capacity data. We propose to study large single crystals of composition Dy2-xYxTi2O7, where x = 0.3 and 1.5, using SXD, in order to understand the anomalous behaviour. We shall measure the average structures using neutron diffraction and the defect structures and any correlations between defects using diffuse neutron scattering. We shall then cool to base temperature to study the magnetic correlations.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24090197
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24090197
Provenance
Creator Professor Andrew Boothroyd; Dr David Voneshen; Dr Dharmalingan Prabhakaran; Professor Jon Goff; Dr Claudio Castelnovo; Dr Gabriele Sala
Publisher ISIS Neutron and Muon Source
Publication Year 2016
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2013-03-15T09:07:37Z
Temporal Coverage End 2013-05-20T04:14:27Z