Novel ground states and spin ordering in pyrochlore iridates

DOI

We request four days of beam time to conduct zero, transverse, and longitudinal field measurements on pyrochlore iridates A2Ir2O7 (A-227) with A = Yb, Y, Nd in the temperature range 200 K to 2 K and in fields from 0 to 0.4 T. Strong spin-orbit scattering, electronic correlations, and magnetic frustration may produce novel ground states in the A-227 system. We have recently observed an unusual magnetically frustrated state that competes with the magnetically ordered ground state, and appears to be stabilized reduction in Ir-Ir interactions via choice of A. We propose the above studies to characterize this phase. Additionally we have observed that the magnetically ordered ground state is different for Nd-227 compared to the other known magnetically ordered members of this family (A = Yb, Y, and Eu), and we propose to begin studies of Nd1-xYxIr2O7 to probe the crossover regime.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24089980
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24089980
Provenance
Creator Dr Sean Giblin; Professor Michael Graf; Dr Steven Disseler
Publisher ISIS Neutron and Muon Source
Publication Year 2015
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 2012-12-10T10:56:55Z
Temporal Coverage End 2012-12-14T07:40:22Z