Spin dynamics in Sn-doped Er2Ti2-xSnxO7: probing the putative quantum critical point at x = 1.8 (MUSR)


The frustrated pyrochlore Er2Ti2O7 is a rare example of a magnetic system in which quantum fluctuations are capable of selecting a unique ground state out of the macroscopically degenerate manifold imposed by frustration. Thus, below 1.2 K the system sets into an ordered AFM ground state, which, on the hand, is highly unconventional for it is one in which short- and long-range ordering coexist and remains dynamic as T --> 0. Sn doping the non-magnetic Ti sublattice monotonically reduces the ordering temperature and seems to drive the system into a quantum critical point at x \simeq 1.8, as seen by ac-susceptibility measurements. As part of a wider study involving specific heat and susceptibility measurements, the aim of the proposed experiments is to confirm the existence of this QCP and check for some unusual changes in spin dynamics that seem to take place with Sn doping.

DOI https://doi.org/10.5286/ISIS.E.24091192
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24091192
Creator Dr Francis Pratt; Professor Stephen Blundell; Professor Teo Rojo; Dr Jorge Lago; Dr Ivica Zivkovic
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
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2013-07-25T10:06:08Z
Temporal Coverage End 2013-07-28T08:53:26Z